{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,28]],"date-time":"2026-10-28T19:38:09Z","timestamp":1793216289707,"version":"4.5.0"},"reference-count":83,"publisher":"Public Library of Science (PLoS)","issue":"1","license":[{"start":{"date-parts":[[2016,1,11]],"date-time":"2016-01-11T00:00:00Z","timestamp":1452470400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS ONE"],"DOI":"10.1371\/journal.pone.0146351","type":"journal-article","created":{"date-parts":[[2016,1,11]],"date-time":"2016-01-11T14:11:18Z","timestamp":1452521478000},"page":"e0146351","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":136,"title":["Serum Vitamin D Level and Rheumatoid Arthritis Disease Activity: Review and Meta-Analysis"],"prefix":"10.1371","volume":"11","author":[{"given":"Jin","family":"Lin","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jian","family":"Liu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael L.","family":"Davies","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weiqian","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2016,1,11]]},"reference":[{"issue":"3","key":"ref1","doi-asserted-by":"crossref","first-page":"130","DOI":"10.1016\/j.autrev.2004.09.002","article-title":"Epidemiology of adult rheumatoid arthritis","volume":"4","author":"Y Alamanos","year":"2005","journal-title":"Autoimmunity reviews"},{"issue":"1","key":"ref2","doi-asserted-by":"crossref","first-page":"59","DOI":"10.1016\/j.autrev.2007.07.001","article-title":"Vitamin D in rheumatoid arthritis","volume":"7","author":"M Cutolo","year":"2007","journal-title":"Autoimmunity reviews"},{"issue":"3","key":"ref3","doi-asserted-by":"crossref","first-page":"293","DOI":"10.3923\/pjn.2012.293.300","article-title":"Relationship between vitamin D and rheumatoid arthritis disease","volume":"11","author":"FS Azzeh","year":"2012","journal-title":"Pakistan Journal of Nutrition"},{"issue":"23","key":"ref4","doi-asserted-by":"crossref","first-page":"2205","DOI":"10.1056\/NEJMra1004965","article-title":"The pathogenesis of rheumatoid arthritis","volume":"365","author":"IB McInnes","year":"2011","journal-title":"The New England journal of medicine"},{"issue":"5","key":"ref5","doi-asserted-by":"crossref","first-page":"461","DOI":"10.1007\/s00393-013-1297-4","article-title":"Role of vitamin D in flare ups of rheumatoid arthritis","volume":"73","author":"A Dehghan","year":"2014","journal-title":"Zeitschrift fur Rheumatologie"},{"issue":"2","key":"ref6","doi-asserted-by":"crossref","first-page":"184","DOI":"10.1097\/BOR.0b013e32835cfc16","article-title":"Vitamin D deficiency and risk for rheumatic diseases: an update","volume":"25","author":"P Gatenby","year":"2013","journal-title":"Current opinion in rheumatology"},{"issue":"4","key":"ref7","doi-asserted-by":"crossref","first-page":"493","DOI":"10.1007\/s00296-009-1251-6","article-title":"Vitamin D level: is it related to disease activity in inflammatory joint disease?","volume":"31","author":"Y Braun-Moscovici","year":"2011","journal-title":"Rheumatology international"},{"issue":"3","key":"ref8","doi-asserted-by":"crossref","first-page":"275","DOI":"10.1007\/s10238-013-0249-2","article-title":"Immunomodulatory effects of vitamin D in peripheral blood monocyte-derived macrophages from patients with rheumatoid arthritis","volume":"14","author":"A Neve","year":"2014","journal-title":"Clinical and experimental medicine"},{"issue":"6","key":"ref9","doi-asserted-by":"crossref","first-page":"817","DOI":"10.1136\/ard.2008.090456","article-title":"Vitamin D and chronic widespread pain in a white middle-aged British population: evidence from a cross-sectional population survey","volume":"68","author":"K Atherton","year":"2009","journal-title":"Annals of the rheumatic diseases"},{"issue":"3","key":"ref10","doi-asserted-by":"crossref","first-page":"315","DOI":"10.1111\/j.1365-2265.2011.04261.x","article-title":"An update on vitamin D and human immunity","volume":"76","author":"M Hewison","year":"2012","journal-title":"Clinical endocrinology"},{"issue":"3","key":"ref11","doi-asserted-by":"crossref","first-page":"261","DOI":"10.1111\/j.1365-3083.2008.02127.x","article-title":"The complex role of vitamin D in autoimmune diseases","volume":"68","author":"P Szodoray","year":"2008","journal-title":"Scand J Immunol"},{"issue":"3","key":"ref12","doi-asserted-by":"crossref","first-page":"491","DOI":"10.3899\/jrheum.090797","article-title":"Vitamin D and the immune system","volume":"37","author":"N Maruotti","year":"2010","journal-title":"J Rheumatol"},{"issue":"1\u20132","key":"ref13","doi-asserted-by":"crossref","first-page":"93","DOI":"10.1016\/j.jsbmb.2005.06.002","article-title":"Immunoregulation by 1,25-dihydroxyvitamin D3: basic concepts","volume":"97","author":"E van Etten","year":"2005","journal-title":"The Journal of steroid biochemistry and molecular biology"},{"key":"ref14","doi-asserted-by":"crossref","first-page":"261","DOI":"10.1016\/B978-0-12-386960-9.00011-3","article-title":"Vitamin D deficiency and connective tissue disease","volume":"86","author":"E Zold","year":"2010","journal-title":"Vitamins and hormones"},{"issue":"6","key":"ref15","doi-asserted-by":"crossref","first-page":"R216","DOI":"10.1186\/ar3195","article-title":"Vitamin D deficiency in rheumatoid arthritis: prevalence, determinants and associations with disease activity and disability","volume":"12","author":"M Rossini","year":"2010","journal-title":"Arthritis research & therapy"},{"issue":"2","key":"ref16","doi-asserted-by":"crossref","first-page":"275","DOI":"10.3899\/jrheum.090705","article-title":"Vitamin D status and its associations with disease activity and severity in African Americans with recent-onset rheumatoid arthritis","volume":"37","author":"SM Craig","year":"2010","journal-title":"J Rheumatol"},{"key":"ref17","article-title":"Prospective population-based study of the association between vitamin D status and incidence of autoimmune disease","author":"T Skaaby","year":"2015","journal-title":"Endocrine"},{"issue":"12","key":"ref18","doi-asserted-by":"crossref","first-page":"3823","DOI":"10.1007\/s00296-011-2268-1","article-title":"Calcium and vitamin D supplementation and incident rheumatoid arthritis: the Women&apos;s Health Initiative Calcium plus Vitamin D trial","volume":"32","author":"M Racovan","year":"2012","journal-title":"Rheumatology international"},{"issue":"12","key":"ref19","doi-asserted-by":"crossref","first-page":"1733","DOI":"10.1007\/s10067-012-2080-7","article-title":"Association between vitamin D intake and the risk of rheumatoid arthritis: a meta-analysis","volume":"31","author":"GG Song","year":"2012","journal-title":"Clinical rheumatology"},{"issue":"15","key":"ref20","doi-asserted-by":"crossref","first-page":"2008","DOI":"10.1001\/jama.283.15.2008","article-title":"Meta-analysis of observational studies in epidemiology: a proposal for reporting","volume":"283","author":"DF Stroup","year":"2000","journal-title":"Jama"},{"issue":"12","key":"ref21","doi-asserted-by":"crossref","first-page":"e83138","DOI":"10.1371\/journal.pone.0083138","article-title":"Evaluation of the endorsement of the preferred reporting items for systematic reviews and meta-analysis (PRISMA) statement on the quality of published systematic review and meta-analyses","volume":"8","author":"N Panic","year":"2013","journal-title":"PloS one"},{"key":"ref22","article-title":"The Newcastle-Ottawa Scale (NOS) for assessing the quality of nonrandomised studies in meta-analyses","author":"G Wells"},{"key":"ref23","article-title":"Celiac disease: Agency for Healthcare Research and Quality","author":"A Rostom","year":"2004","journal-title":"Celiac disease: Agency for Healthcare Research and Quality"},{"issue":"1","key":"ref24","doi-asserted-by":"crossref","first-page":"120","DOI":"10.1093\/ije\/dym159","article-title":"Assessment of cumulative evidence on genetic associations: interim guidelines","volume":"37","author":"JP Ioannidis","year":"2008","journal-title":"International journal of epidemiology"},{"issue":"3","key":"ref25","doi-asserted-by":"crossref","first-page":"499","DOI":"10.1007\/s00296-014-3071-6","article-title":"Vitamin D levels and bone mass in rheumatoid arthritis","volume":"35","author":"ML Brance","year":"2015","journal-title":"Rheumatology international"},{"issue":"6","key":"ref26","doi-asserted-by":"crossref","first-page":"181","DOI":"10.1177\/2042018812471070","article-title":"Vitamin D and rheumatoid arthritis","volume":"3","author":"I Kostoglou-Athanassiou","year":"2012","journal-title":"Therapeutic advances in endocrinology and metabolism"},{"issue":"6","key":"ref27","first-page":"702","article-title":"Circannual vitamin d serum levels and disease activity in rheumatoid arthritis: Northern versus Southern Europe","volume":"24","author":"M Cutolo","year":"2006","journal-title":"Clin Exp Rheumatol"},{"key":"ref28","doi-asserted-by":"crossref","first-page":"316","DOI":"10.1016\/j.cca.2014.08.040","article-title":"Vitamin D in ankylosing spondylitis: review and meta-analysis","volume":"438","author":"G Cai","year":"2015","journal-title":"Clinica chimica acta; international journal of clinical chemistry"},{"issue":"7","key":"ref29","doi-asserted-by":"crossref","first-page":"1911","DOI":"10.1210\/jc.2011-0385","article-title":"Evaluation, treatment, and prevention of vitamin D deficiency: an Endocrine Society clinical practice guideline","volume":"96","author":"MF Holick","year":"2011","journal-title":"The Journal of clinical endocrinology and metabolism"},{"key":"ref30","first-page":"32","article-title":"Vitamin D status as an international issue: national surveys and the problem of standardization. Scandinavian journal of clinical and laboratory investigation","volume":"243","author":"CT Sempos","year":"2012","journal-title":"Supplementum"},{"issue":"3","key":"ref31","doi-asserted-by":"crossref","first-page":"419","DOI":"10.1177\/0013164496056003004","article-title":"Approximating Pearson product-moment correlations from Kendall&apos;s tau and Spearman&apos;s rho","volume":"56","author":"MT Rupinski","year":"1996","journal-title":"Educational and psychological measurement"},{"key":"ref32","article-title":"Introduction to meta-analysis","author":"M Borenstein","year":"2011"},{"issue":"18","key":"ref33","doi-asserted-by":"crossref","first-page":"3499","DOI":"10.1016\/j.ejca.2012.05.001","article-title":"Correlation between Ki-67 immunohistochemistry and 18F-fluorothymidine uptake in patients with cancer: A systematic review and meta-analysis","volume":"48","author":"A Chalkidou","year":"2012","journal-title":"European journal of cancer"},{"issue":"3","key":"ref34","doi-asserted-by":"crossref","first-page":"257","DOI":"10.4104\/pcrj.2011.00029","article-title":"Factors that influence disease-specific quality of life or health status in patients with COPD: a review and meta-analysis of Pearson correlations","volume":"20","author":"I Tsiligianni","year":"2011","journal-title":"Primary care respiratory journal: journal of the General Practice Airways Group"},{"issue":"12","key":"ref35","doi-asserted-by":"crossref","first-page":"889","DOI":"10.7326\/0003-4819-149-12-200812160-00008","article-title":"Systematic reviews of diagnostic test accuracy","volume":"149","author":"MM Leeflang","year":"2008","journal-title":"Annals of internal medicine"},{"issue":"1","key":"ref36","doi-asserted-by":"crossref","first-page":"31","DOI":"10.1186\/1471-2288-6-31","article-title":"Meta-DiSc: a software for meta-analysis of test accuracy data","volume":"6","author":"J Zamora","year":"2006","journal-title":"BMC medical research methodology"},{"issue":"7414","key":"ref37","doi-asserted-by":"crossref","first-page":"557","DOI":"10.1136\/bmj.327.7414.557","article-title":"Measuring inconsistency in meta-analyses","volume":"327","author":"JP Higgins","year":"2003","journal-title":"BMJ: British Medical Journal"},{"issue":"3","key":"ref38","doi-asserted-by":"crossref","first-page":"177","DOI":"10.1016\/0197-2456(86)90046-2","article-title":"Meta-analysis in clinical trials","volume":"7","author":"R DerSimonian","year":"1986","journal-title":"Controlled clinical trials"},{"issue":"7109","key":"ref39","doi-asserted-by":"crossref","first-page":"629","DOI":"10.1136\/bmj.315.7109.629","article-title":"Bias in meta-analysis detected by a simple, graphical test","volume":"315","author":"M Egger","year":"1997","journal-title":"Bmj"},{"key":"ref40","first-page":"185","article-title":"Statistical methods","author":"S GW","year":"1980"},{"issue":"1","key":"ref41","first-page":"47","article-title":"Seasonal disease activity and serum vitamin D levels in rheumatoid arthritis, ankylosing spondylitis and osteoarthritis","volume":"13","author":"L Yazmalar","year":"2013","journal-title":"African health sciences"},{"issue":"5","key":"ref42","first-page":"745","article-title":"Relationships among vitamin D, disease activity, pain and disability in rheumatoid arthritis","volume":"28","author":"UJ Haque","year":"2010","journal-title":"Clin Exp Rheumatol"},{"issue":"12","key":"ref43","doi-asserted-by":"crossref","first-page":"2243","DOI":"10.1093\/rheumatology\/keu276","article-title":"Circulating 25-hydroxyvitamin D level and risk of developing rheumatoid arthritis","volume":"53","author":"LT Hiraki","year":"2014","journal-title":"Rheumatology"},{"issue":"3","key":"ref44","doi-asserted-by":"crossref","first-page":"113","DOI":"10.4081\/reumatismo.2013.113","article-title":"Regional differences of vitamin D deficiency in rheumatoid arthritis patients in Italy","volume":"65","author":"M Rossini","year":"2013","journal-title":"Reumatismo"},{"issue":"3","key":"ref45","doi-asserted-by":"crossref","first-page":"193","DOI":"10.1007\/s002239900416","article-title":"Relationship between disease activity and serum levels of vitamin D metabolites and PTH in rheumatoid arthritis","volume":"62","author":"P Oelzner","year":"1998","journal-title":"Calcified tissue international"},{"issue":"9","key":"ref46","doi-asserted-by":"crossref","first-page":"841","DOI":"10.1093\/rheumatology\/38.9.841","article-title":"Relationship between soluble markers of immune activation and bone turnover in post-menopausal women with rheumatoid arthritis","volume":"38","author":"P Oelzner","year":"1999","journal-title":"Rheumatology"},{"issue":"10","key":"ref47","doi-asserted-by":"crossref","first-page":"908","DOI":"10.1007\/s00296-005-0095-y","article-title":"Hypercalcemia in rheumatoid arthritis: relationship with disease activity and bone metabolism","volume":"26","author":"P Oelzner","year":"2006","journal-title":"Rheumatology international"},{"key":"ref48","article-title":"Vitamin D status in rheumatoid arthritis patients: relation to clinical manifestations, disease activity, quality of life and fibromyalgia syndrome","author":"TA Gheita","year":"2014","journal-title":"Int J Rheum Dis"},{"issue":"11","key":"ref49","doi-asserted-by":"crossref","first-page":"1994","DOI":"10.1093\/rheumatology\/keu173","article-title":"Associations between serum 25-hydroxyvitamin D and disease activity, inflammatory cytokines and bone loss in patients with rheumatoid arthritis","volume":"53","author":"Q Hong","year":"2014","journal-title":"Rheumatology"},{"issue":"3","key":"ref50","doi-asserted-by":"crossref","first-page":"126","DOI":"10.1097\/RHU.0000000000000233","article-title":"Vitamin d status and its association with quality of life, physical activity, and disease activity in rheumatoid arthritis patients","volume":"21","author":"A Raczkiewicz","year":"2015","journal-title":"Journal of clinical rheumatology: practical reports on rheumatic & musculoskeletal diseases"},{"issue":"5","key":"ref51","first-page":"520","article-title":"Vitamin D deficiency in rheumatoid arthritis. Prevalence and association with disease activity in Western Saudi Arabia","volume":"33","author":"SM Attar","year":"2012","journal-title":"Saudi medical journal"},{"issue":"6","key":"ref52","doi-asserted-by":"crossref","first-page":"512","DOI":"10.1016\/j.semarthrit.2010.07.009","article-title":"Does vitamin D affect risk of developing autoimmune disease?: a systematic review","volume":"40","author":"MA Kriegel","year":"2011","journal-title":"Seminars in arthritis and rheumatism"},{"issue":"5 Suppl 85","key":"ref53","first-page":"S-65","article-title":"The development of the disease activity score (DAS) and the disease activity score using 28 joint counts (DAS28)","volume":"32","author":"PL van Riel","year":"2014","journal-title":"Clin Exp Rheumatol"},{"issue":"10","key":"ref54","first-page":"521","article-title":"Erythrocyte sedimentation rate, plasma viscosity and C-reactive protein in clinical practice","volume":"58","author":"T Ng","year":"1997","journal-title":"British journal of hospital medicine"},{"key":"ref55","article-title":"Annals of the rheumatic diseases","author":"J Fransen","year":"2003"},{"key":"ref56","article-title":"In wealthier countries, patients perceive worse impact of the disease although they have lower objectively assessed disease activity: results from the cross-sectional COMORA study","author":"P Putrik","year":"2015","journal-title":"Annals of the rheumatic diseases"},{"issue":"1","key":"ref57","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1111\/j.1365-2249.2010.04139.x","article-title":"The &apos;hygiene hypothesis&apos; for autoimmune and allergic diseases: an update","volume":"160","author":"H Okada","year":"2010","journal-title":"Clinical and experimental immunology"},{"issue":"1","key":"ref58","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1111\/j.1365-2249.2005.02940.x","article-title":"Early environmental factors and rheumatoid arthritis","volume":"143","author":"CJ Edwards","year":"2006","journal-title":"Clinical and experimental immunology"},{"issue":"1","key":"ref59","doi-asserted-by":"crossref","first-page":"68","DOI":"10.1093\/jn\/128.1.68","article-title":"1,25-Dihydroxycholecalciferol inhibits the progression of arthritis in murine models of human arthritis","volume":"128","author":"MT Cantorna","year":"1998","journal-title":"The Journal of nutrition"},{"issue":"2","key":"ref60","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1016\/j.cellimm.2005.04.013","article-title":"Intervention in autoimmunity: the potential of vitamin D receptor agonists","volume":"233","author":"L Adorini","year":"2005","journal-title":"Cellular immunology"},{"key":"ref61","article-title":"Association between VDR polymorphisms and rheumatoid arthritis disease: Systematic review and updated meta-analysis of case-control studies","author":"K Tizaoui","year":"2014","journal-title":"Immunobiology"},{"issue":"12","key":"ref62","doi-asserted-by":"crossref","first-page":"E1927","DOI":"10.1210\/jc.2013-2820","article-title":"A randomized study on the effect of vitamin D(3) supplementation on skeletal muscle morphology and vitamin D receptor concentration in older women","volume":"98","author":"L Ceglia","year":"2013","journal-title":"The Journal of clinical endocrinology and metabolism"},{"issue":"6","key":"ref63","doi-asserted-by":"crossref","first-page":"552","DOI":"10.1016\/j.jbspin.2010.09.018","article-title":"Vitamin D and inflammation","volume":"77","author":"X Guillot","year":"2010","journal-title":"Joint, bone, spine: revue du rhumatisme"},{"issue":"9","key":"ref64","doi-asserted-by":"crossref","first-page":"1137","DOI":"10.1136\/ard.2007.069831","article-title":"Vitamin D and autoimmunity: new aetiological and therapeutic considerations","volume":"66","author":"Y Arnson","year":"2007","journal-title":"Annals of the rheumatic diseases"},{"issue":"5","key":"ref65","doi-asserted-by":"crossref","first-page":"1006","DOI":"10.3945\/ajcn.110.008490","article-title":"The relation between acute changes in the systemic inflammatory response and plasma 25-hydroxyvitamin D concentrations after elective knee arthroplasty","volume":"93","author":"D Reid","year":"2011","journal-title":"The American journal of clinical nutrition"},{"key":"ref66","first-page":"31","article-title":"Effects of rituximab treatment on the serum concentrations of vitamin D and interleukins 2, 6, 7, and 10 in patients with rheumatoid arthritis","volume":"6","author":"E Hasan","year":"2012","journal-title":"Biologics: targets & therapy"},{"issue":"6","key":"ref67","doi-asserted-by":"crossref","first-page":"1165","DOI":"10.1136\/ard.2010.137265","article-title":"Vitamin D deficiency is common in patients with RA and linked to disease activity, but circulating levels are unaffected by TNFalpha blockade: results from a prospective cohort study","volume":"70","author":"P Welsh","year":"2011","journal-title":"Annals of the rheumatic diseases"},{"issue":"3","key":"ref68","first-page":"148","article-title":"25(OH) vitamin D serum values and rheumatoid arthritis disease activity (DA S28 ESR)","volume":"5","author":"M Sahebari","year":"2014","journal-title":"Caspian journal of internal medicine"},{"issue":"1","key":"ref69","doi-asserted-by":"crossref","first-page":"125","DOI":"10.1016\/j.rdc.2012.03.012","article-title":"Vitamin D and the immune system: new perspectives on an old theme","volume":"38","author":"M Hewison","year":"2012","journal-title":"Rheumatic diseases clinics of North America"},{"issue":"4","key":"ref70","doi-asserted-by":"crossref","first-page":"332","DOI":"10.1111\/j.1756-185X.2011.01684.x","article-title":"Supplementation of 1,25 dihydroxy vitamin D3 in patients with treatment naive early rheumatoid arthritis: a randomised controlled trial","volume":"14","author":"K Gopinath","year":"2011","journal-title":"Int J Rheum Dis"},{"issue":"6","key":"ref71","doi-asserted-by":"crossref","first-page":"757","DOI":"10.1016\/j.mehy.2012.08.022","article-title":"Combined therapeutic application of mTOR inhibitor and vitamin D(3) for inflammatory bone destruction of rheumatoid arthritis","volume":"79","author":"TH Kim","year":"2012","journal-title":"Medical hypotheses"},{"issue":"5","key":"ref72","first-page":"714","article-title":"Determinants and effects of vitamin D supplementation on serum 25-hydroxy-vitamin D levels in patients with rheumatoid arthritis","volume":"30","author":"M Varenna","year":"2012","journal-title":"Clin Exp Rheumatol"},{"issue":"9","key":"ref73","doi-asserted-by":"crossref","first-page":"1595","DOI":"10.1093\/rheumatology\/keu042","article-title":"Systematic review of association between vitamin D levels and susceptibility and disease activity of ankylosing spondylitis","volume":"53","author":"S Zhao","year":"2014","journal-title":"Rheumatology"},{"issue":"8","key":"ref74","first-page":"806","article-title":"Serum 25-hydroxyvitamin D concentration in patients with psoriasis and rheumatoid arthritis and its association with disease activity and serum tumor necrosis factor-alpha","volume":"34","author":"MA Atwa","year":"2013","journal-title":"Saudi medical journal"},{"issue":"10","key":"ref75","doi-asserted-by":"crossref","first-page":"610","DOI":"10.4149\/BLL_2012_137","article-title":"Is there an association between serum 25-hydroxyvitamin d concentrations and disease activity in rheumatoid arthritis?","volume":"113","author":"T Baykal","year":"2013","journal-title":"Bratislava Medical Journal"},{"issue":"7","key":"ref76","doi-asserted-by":"crossref","first-page":"2268","DOI":"10.3390\/nu5072268","article-title":"Vitamin D status is associated with disease activity among rheumatology outpatients","volume":"5","author":"Z Sabbagh","year":"2013","journal-title":"Nutrients"},{"issue":"5","key":"ref77","first-page":"658","article-title":"Associations between vitamin D, disease activity, and clinical response to therapy in rheumatoid arthritis","volume":"30","author":"JF Baker","year":"2012","journal-title":"Clin Exp Rheumatol"},{"issue":"1","key":"ref78","doi-asserted-by":"crossref","first-page":"66","DOI":"10.1111\/1756-185X.12160","article-title":"Vitamin D deficiency and low bone mineral density in native Chinese rheumatoid arthritis patients","volume":"17","author":"J Chen","year":"2014","journal-title":"Int J Rheum Dis"},{"issue":"2","key":"ref79","doi-asserted-by":"crossref","first-page":"246","DOI":"10.3109\/14397595.2014.952487","article-title":"Relationships between serum 25-hydroxycalciferol, vitamin D intake and disease activity in patients with rheumatoid arthritis\u2014TOMORROW study","volume":"25","author":"Y Matsumoto","year":"2015","journal-title":"Modern rheumatology \/ the Japan Rheumatism Association"},{"key":"ref80","doi-asserted-by":"crossref","first-page":"260725","DOI":"10.1155\/2015\/260725","article-title":"Vitamin D Is a Good Marker for Disease Activity of Rheumatoid Arthritis Disease","volume":"2015","author":"FS Azzeh","year":"2015","journal-title":"Disease markers"},{"issue":"8","key":"ref81","first-page":"678","article-title":"Estimation of vitamin D levels in rheumatoid arthritis patients and its correlation with the disease activity","volume":"62","author":"R Sharma","year":"2014","journal-title":"The Journal of the Association of Physicians of India"},{"issue":"7","key":"ref82","doi-asserted-by":"crossref","first-page":"911","DOI":"10.1007\/s00296-010-1393-6","article-title":"The relationship between vitamin D and disease activity and functional health status in rheumatoid arthritis","volume":"31","author":"AD Turhanoglu","year":"2011","journal-title":"Rheumatology international"},{"issue":"4","key":"ref83","doi-asserted-by":"crossref","first-page":"991","DOI":"10.1007\/s00296-010-1736-3","article-title":"The status of serum vitamin D in patients with rheumatoid arthritis and undifferentiated inflammatory arthritis compared with controls","volume":"32","author":"B Heidari","year":"2012","journal-title":"Rheumatology international"}],"container-title":["PLOS ONE"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/dx.plos.org\/10.1371\/journal.pone.0146351","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,9,3]],"date-time":"2019-09-03T07:54:30Z","timestamp":1567497270000},"score":1,"resource":{"primary":{"URL":"https:\/\/dx.plos.org\/10.1371\/journal.pone.0146351"}},"subtitle":[],"editor":[{"given":"Yongshuai","family":"Jiang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"editor"}]}],"short-title":[],"issued":{"date-parts":[[2016,1,11]]},"references-count":83,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2016,1,11]]}},"URL":"https:\/\/doi.org\/10.1371\/journal.pone.0146351","relation":{},"ISSN":["1932-6203"],"issn-type":[{"value":"1932-6203","type":"electronic"}],"subject":[],"published":{"date-parts":[[2016,1,11]]}}}