{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,31]],"date-time":"2026-01-31T11:06:38Z","timestamp":1769857598372,"version":"3.49.0"},"reference-count":79,"publisher":"Public Library of Science (PLoS)","issue":"1","license":[{"start":{"date-parts":[[2014,1,23]],"date-time":"2014-01-23T00:00:00Z","timestamp":1390435200000},"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.0087071","type":"journal-article","created":{"date-parts":[[2014,1,23]],"date-time":"2014-01-23T23:49:33Z","timestamp":1390520973000},"page":"e87071","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":44,"title":["Reassessment of the Psychometric Characteristics and Factor Structure of the \u2018Perceived Stress Questionnaire\u2019 (PSQ): Analysis in a Sample of Dental Students"],"prefix":"10.1371","volume":"9","author":[{"given":"Jes\u00fas","family":"Montero-Marin","sequence":"first","affiliation":[]},{"given":"Marcelo Marcos","family":"Piva Demarzo","sequence":"additional","affiliation":[]},{"given":"Joao Paulo","family":"Pereira","sequence":"additional","affiliation":[]},{"given":"Marina","family":"Olea","sequence":"additional","affiliation":[]},{"given":"Javier","family":"Garc\u00eda-Campayo","sequence":"additional","affiliation":[]}],"member":"340","published-online":{"date-parts":[[2014,1,23]]},"reference":[{"key":"ref1","doi-asserted-by":"crossref","first-page":"196","DOI":"10.1002\/j.0022-0337.1984.48.4.tb01775.x","article-title":"Stress management training for dental students","volume":"48(4)","author":"DA Tisdelle","year":"1984","journal-title":"J Dent Educ"},{"key":"ref2","doi-asserted-by":"crossref","first-page":"354","DOI":"10.1097\/00001888-200604000-00009","article-title":"Systematic review of depression, anxiety and other indicators of psychological distress among U.S. and Canadian medical students","volume":"81(4)","author":"LN Dyrbye","year":"2006","journal-title":"Acad Med"},{"key":"ref3","doi-asserted-by":"crossref","first-page":"1534","DOI":"10.1016\/j.ijnurstu.2007.11.003","article-title":"A study of stress and burnout in nursing students in Hong Kong: a questionnaire survey","volume":"45(10)","author":"R Watson","year":"2008","journal-title":"Int J Nurs Stud"},{"key":"ref4","doi-asserted-by":"crossref","first-page":"1107","DOI":"10.1002\/j.0022-0337.2011.75.8.tb05156.x","article-title":"Psychological stress among dental students at the University of Jordan","volume":"75(8)","author":"SB Abu-Ghazaleh","year":"2011","journal-title":"J Dent Educ"},{"key":"ref5","doi-asserted-by":"crossref","first-page":"188","DOI":"10.1080\/13548506.2011.597770","article-title":"The prevalence and correlations of medical student burnout in the pre-clinical years: a cross-sectional","volume":"17(2)","author":"R Mazurkiewicz","year":"2012","journal-title":"Psychol Health Med"},{"key":"ref6","first-page":"155","article-title":"Burnout syndrome among dental students","volume":"15(1)","author":"JA Campos","year":"2012","journal-title":"Rev Bras Epidemiol"},{"key":"ref7","doi-asserted-by":"crossref","first-page":"232","DOI":"10.1002\/j.0022-0337.2001.65.3.tb03392.x","article-title":"Perceived sources of stress among dental students at the University of Jordan","volume":"65(3)","author":"LD Rajab","year":"2001","journal-title":"J Dent Educ"},{"key":"ref8","doi-asserted-by":"crossref","first-page":"78","DOI":"10.1111\/j.1600-0579.2004.00359.x","article-title":"Stress, burnout and health in the clinical period of dental education","volume":"9(2)","author":"K P\u00f6hlmann","year":"2005","journal-title":"Eur J Dent Educ"},{"key":"ref9","doi-asserted-by":"crossref","first-page":"8","DOI":"10.1111\/j.1600-0579.2010.00640.x","article-title":"Stress amongst dental students: a systematic review","volume":"15(1)","author":"AM Alzahem","year":"2011","journal-title":"Eur J Dent Educ"},{"key":"ref10","doi-asserted-by":"crossref","first-page":"279","DOI":"10.1111\/j.1875-595X.2007.tb00133.x","article-title":"Outcome of career expectancies and early professional burnout among newly qualified dentists","volume":"57(4)","author":"RC Gorter","year":"2007","journal-title":"Int Dent J"},{"key":"ref11","doi-asserted-by":"crossref","unstructured":"Lazarus R, Folkman S (1984) Stress, appraisal and coping. Barcelona: Mart\u00ednez Roca. 46 p.","DOI":"10.1037\/\/0022-3514.46.4.839"},{"key":"ref12","doi-asserted-by":"crossref","first-page":"397","DOI":"10.1146\/annurev.psych.52.1.397","article-title":"Job burnout","volume":"52","author":"C Maslach","year":"2001","journal-title":"Annu Rev Psychol"},{"key":"ref13","unstructured":"Maslach C, Jackson SE, Leiter MP (1996) Maslach Burnout Inventory. Palo Alto, CA: Consulting Psychologist Press."},{"key":"ref14","doi-asserted-by":"crossref","first-page":"598","DOI":"10.1192\/bjp.147.6.598","article-title":"Resilience in the face of adversity: protective factors and resistance to psychiatric disorders","volume":"147","author":"M Rutter","year":"1985","journal-title":"Br J Psych"},{"key":"ref15","doi-asserted-by":"crossref","first-page":"127","DOI":"10.1007\/s10464-007-9156-6","article-title":"Community resilience as a metaphor, theory, set of capacities and strategy for disaster readiness","volume":"41","author":"FH Norris","year":"2008","journal-title":"Am J Community Psychol"},{"key":"ref16","doi-asserted-by":"crossref","first-page":"698","DOI":"10.1188\/10.ONF.698-705","article-title":"Resilience: the power within","volume":"37(6)","author":"E Grafton","year":"2010","journal-title":"Oncol Nurs Forum"},{"key":"ref17","doi-asserted-by":"crossref","first-page":"44","DOI":"10.1176\/appi.ap.32.1.44","article-title":"A conceptual model of medical student well-being: promoting resilience and preventing burnout","volume":"32(1)","author":"LB Dunn","year":"2008","journal-title":"Acad Psychiatry"},{"key":"ref18","unstructured":"Gil-Monte PR, Moreno-Jim\u00e9nez B (2007) The Burnout Syndrome: Professional Groups at Risk. Madrid: Pir\u00e1mide Psicolog\u00eda."},{"key":"ref19","first-page":"392","article-title":"A review of burnout in dentists","volume":"25(9)","author":"G Humphris","year":"1998","journal-title":"Dent Update"},{"key":"ref20","unstructured":"Schaufeli W, Enzmann D (1998) The burnout companion to study and practice: A critical analysis. London: Taylor &amp; Francis."},{"key":"ref21","doi-asserted-by":"crossref","first-page":"788","DOI":"10.14219\/jada.archive.2004.0279","article-title":"Stress, burnout, anxiety and depression among dentists","volume":"135(6)","author":"RE Rada","year":"2004","journal-title":"J Am Dent Assoc"},{"key":"ref22","doi-asserted-by":"crossref","first-page":"1388","DOI":"10.14219\/jada.archive.2005.0052","article-title":"Speciality and sex as predictors of depression in dentists","volume":"136(10)","author":"S Mathias","year":"2005","journal-title":"J Am Dent Assoc"},{"key":"ref23","doi-asserted-by":"crossref","first-page":"344","DOI":"10.1037\/1076-8998.10.4.344","article-title":"The association between burnout, depression, anxiety and inflammation biomarkers: C-reactive protein and fibrinogen in men and women","volume":"10(4)","author":"S Toker","year":"2005","journal-title":"J Occup Health Psychol"},{"key":"ref24","doi-asserted-by":"crossref","first-page":"182","DOI":"10.1213\/ANE.0b013e3182917da9","article-title":"The prevalence of burnout and depression and their association with adherence to safety and practice standards: a survey of United States anesthesiology trainees","volume":"117(1)","author":"GS Oliveira Jr","year":"2013","journal-title":"Anesth Analg"},{"key":"ref25","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1016\/0022-3999(93)90120-5","article-title":"Development of the Perceived Stress Questionnaire: a new tool for psychosomatic research","volume":"37","author":"S Levenstein","year":"1993","journal-title":"J Psychosom Res"},{"key":"ref26","doi-asserted-by":"crossref","first-page":"1213","DOI":"10.1111\/j.1572-0241.2000.02012.x","article-title":"Stress and exacerbation in ulcerative colitis: a prospective study of patients enrolled in remission","volume":"95","author":"S Levenstein","year":"2000","journal-title":"Am J Gastroenterol"},{"key":"ref27","doi-asserted-by":"crossref","first-page":"167","DOI":"10.1016\/S0022-3999(01)00275-6","article-title":"Validation of the Spanish version of the Perceived Stress Questionnaire","volume":"52","author":"C Sanz-Carrillo","year":"2002","journal-title":"J Psychosom Res"},{"key":"ref28","doi-asserted-by":"crossref","first-page":"78","DOI":"10.1097\/01.psy.0000151491.80178.78","article-title":"The Perceived Stress Questionnaire (PSQ) reconsidered: validation and reference values from different clinical and healthy adult samples","volume":"67(1)","author":"H Fliege","year":"2005","journal-title":"Psychosom Med"},{"key":"ref29","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1186\/1471-244X-13-122","article-title":"Detecting depression among adolescent in Santiago, Chile: sex differences","volume":"13","author":"R Araya","year":"2013","journal-title":"BMC Psychiatry"},{"key":"ref30","first-page":"18","article-title":"El An\u00e1lisis Factorial como t\u00e9cnica de investigaci\u00f3n en Psicolog\u00eda","volume":"31","author":"PJ Ferrando","year":"2010","journal-title":"Papeles del Psic\u00f3logo"},{"key":"ref31","doi-asserted-by":"crossref","first-page":"897","DOI":"10.1136\/bmj.297.6653.897","article-title":"Detecting anxiety and depression in general medical settings","volume":"97","author":"D Goldberg","year":"1988","journal-title":"Br Med J"},{"key":"ref32","first-page":"345","article-title":"Anxiety scales and Goldberg\u2019s depression: an efficient interview guide for the detection of psychological distress","volume":"12(6)","author":"C Mont\u00f3n","year":"1993","journal-title":"Aten Primaria"},{"key":"ref33","first-page":"491","article-title":"Perception of psychological distress by the doctor in a basic health area","volume":"22","author":"P Barreto","year":"1998","journal-title":"Aten Primaria"},{"key":"ref34","first-page":"285","article-title":"Can we detect mental disorders in primary healthcare? Usefulness and concordance of two diagnostic instruments","volume":"23","author":"R Mart\u00ednez","year":"1999","journal-title":"Aten Primaria"},{"key":"ref35","doi-asserted-by":"crossref","first-page":"63","DOI":"10.1186\/1477-7525-9-63","article-title":"Reliability and validity of the Spanish version of the 10-item Connor-Davidson Resilience Scale (10-item CD-RISC) in young adults","volume":"9","author":"B Notario-Pacheco","year":"2011","journal-title":"Health Qual Life Outcomes"},{"key":"ref36","doi-asserted-by":"crossref","first-page":"1019","DOI":"10.1002\/jts.20271","article-title":"Psychometric analysis and refinement of the Connor-Davidson Resilience Scale (CD-RISC): validation of a 10-item measure of resilience","volume":"20","author":"L Campbell-Sills","year":"2007","journal-title":"J Trauma Stress"},{"key":"ref37","doi-asserted-by":"crossref","first-page":"464","DOI":"10.1177\/0022022102033005003","article-title":"Burnout and engagement in university students: A cross-national study","volume":"33(5)","author":"W Schaufeli","year":"2002","journal-title":"J Cross Cult Psychol"},{"key":"ref38","first-page":"115","article-title":"Applications of some measures of multivariate skewness and kurtosis in testing normality and robustness studies","volume":"36","author":"K Mardia","year":"1974","journal-title":"Sankhya"},{"key":"ref39","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1111\/j.2044-8317.1992.tb00975.x","article-title":"A comparison of some methodologies for the factor analysis of non-normal Likert variables: A note on the size of the model","volume":"45","author":"B Muth\u00e9n","year":"1992","journal-title":"Br J Math Stat Psychol"},{"key":"ref40","doi-asserted-by":"crossref","first-page":"179","DOI":"10.1007\/BF02289447","article-title":"A rationale and test for the number of factors in factor analysis","volume":"30","author":"JL Horn","year":"1965","journal-title":"Psychometrika"},{"key":"ref41","doi-asserted-by":"crossref","first-page":"509","DOI":"10.1207\/s15327906mbr2704_2","article-title":"Remarks on parallel analysis","volume":"27(4)","author":"A Buja","year":"1992","journal-title":"Multivar Behav Res"},{"key":"ref42","doi-asserted-by":"crossref","first-page":"209","DOI":"10.1037\/a0023353","article-title":"Dimensionality Assessment of Ordered Polytomous Items with Parallel Analysis","volume":"16","author":"ME Timmerman","year":"2011","journal-title":"Psychol Methods"},{"key":"ref43","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1177\/1094428104263675","article-title":"Factor Retention Decisions in Exploratory Factor Analysis: a Tutorial on Parallel Analysis","volume":"7","author":"JC Hayton","year":"2004","journal-title":"Organ Res Methods"},{"key":"ref44","first-page":"2","article-title":"Determining the number of factors to retain in EFA: an easy-to-use computer program for carrying out Parallel Analysis","volume":"12","author":"RD Ledesma","year":"2007","journal-title":"Practical Assessment, Research & Evaluation"},{"key":"ref45","unstructured":"Garc\u00eda E, Gil J, Rodr\u00edguez G (2000) An\u00e1lisis Factorial. Madrid: La Muralla."},{"key":"ref46","unstructured":"J\u00f6reskog KG (1977) Factor analysis by least-squares and maximum-likelihood methods. In Enslein K, Ralston A, Wilf HS, Editors. Statistical methods for digital computers. New York: Wiley. 125\u2013153 pp."},{"key":"ref47","doi-asserted-by":"crossref","first-page":"25","DOI":"10.1207\/S15327906MBR3801_2","article-title":"Recovery of weak common factors by maximum likelihood and ordinary least squares estimation","volume":"38","author":"NE Briggs","year":"2003","journal-title":"Multivariate Behav Res"},{"key":"ref48","doi-asserted-by":"crossref","first-page":"314","DOI":"10.1080\/00273171.2012.658340","article-title":"Ordinary least squares estimation of parameters in exploratory factor analysis with ordinal data","volume":"47","author":"Ch Lee","year":"2012","journal-title":"Multivariate Behav Res"},{"key":"ref49","doi-asserted-by":"crossref","first-page":"457","DOI":"10.1207\/s15327906mbr2603_5","article-title":"Empirical comparisons between factor analysis and multidimensional item response models","volume":"26","author":"DL Knol","year":"1991","journal-title":"Multivariate Behav Res"},{"key":"ref50","doi-asserted-by":"crossref","first-page":"35","DOI":"10.1177\/014662169101500105","article-title":"An applied comparison of methods for least-squares factor analysis of dichotomous variables","volume":"15","author":"CDH Parry","year":"1991","journal-title":"Appl Psychol Meas"},{"key":"ref51","first-page":"567","article-title":"Factor simplicity index and transformations","volume":"59","author":"PM Bentler","year":"1977","journal-title":"Psychometrika"},{"key":"ref52","doi-asserted-by":"crossref","first-page":"49","DOI":"10.1007\/BF02296652","article-title":"A factor simplicity index","volume":"68","author":"U Lorenzo-Seva","year":"2003","journal-title":"Psychometrika"},{"key":"ref53","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1007\/BF02289209","article-title":"The development of hierarchical factor solutions","volume":"22","author":"J Schmid","year":"1957","journal-title":"Psychometrika"},{"key":"ref54","doi-asserted-by":"crossref","first-page":"544","DOI":"10.1080\/00223891.2010.496477","article-title":"Bifactor models and rotations: Exploring the extent to which multidimensional data yield univocal scale scores","volume":"92","author":"SP Reise","year":"2010","journal-title":"J Pers Assess"},{"key":"ref55","doi-asserted-by":"crossref","first-page":"401","DOI":"10.1177\/014662168500900409","article-title":"The difficulty of test items that measure more than one ability","volume":"9","author":"MD Reckase","year":"1985","journal-title":"App Psychol Meas"},{"key":"ref56","unstructured":"M\u00fa\u00f1iz J, Fidalgo AM (2005) An\u00e1lisis de los \u00edtems. Madrid: La Muralla. 88 p."},{"key":"ref57","unstructured":"Byrne BM (2001) Structural equation modeling with Amos: Basic concepts, applications and programming. Mahwah, NJ: Erlbaum."},{"key":"ref58","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1080\/10705519909540118","article-title":"Cutoff criteria for fit indexes in covariance structure analysis: Conventional criteria vs. new alternatives","volume":"6","author":"LT Hu","year":"1999","journal-title":"Struct Equ Modeling"},{"key":"ref59","unstructured":"L\u00e9vy JP, Mart\u00edn MT, Rom\u00e1n MV (2006) Optimizaci\u00f3n seg\u00fan estructuras de covarianzas. In L\u00e9vy JP, Varela J, editors. Modelizaci\u00f3n con Estructuras de Covarianzas en Ciencias Sociales. A Coru\u00f1a: Netbiblo. 21\u201322 pp."},{"key":"ref60","doi-asserted-by":"crossref","first-page":"375","DOI":"10.1007\/BF02294061","article-title":"Sample size and Bentler and Bonett\u2019s non-normed fit index","volume":"51","author":"KA Bollen","year":"1986","journal-title":"Psychometrika"},{"key":"ref61","doi-asserted-by":"crossref","first-page":"173","DOI":"10.1177\/01466216970212006","article-title":"Estimation of composite reliability for congeneric measures","volume":"2","author":"T Raykov","year":"1997","journal-title":"App Psychol Meas"},{"key":"ref62","doi-asserted-by":"crossref","first-page":"930","DOI":"10.1177\/0013164406288165","article-title":"Congeneric and (essentially) tau-equivalent estimates of score reliability: What they are and how to use them","volume":"66","author":"JM Graham","year":"2006","journal-title":"Educ Psychol Meas"},{"key":"ref63","doi-asserted-by":"crossref","first-page":"59","DOI":"10.1177\/014662169001400106","article-title":"Fitting a polytomous item response model to Likert-type data","volume":"14","author":"E Muraki","year":"1990","journal-title":"App Psychol Meas"},{"key":"ref64","first-page":"100","article-title":"The future of the replication movement","volume":"4(1)","author":"G King","year":"2003","journal-title":"International Studies Perspectives"},{"key":"ref65","first-page":"88","article-title":"\u2018The <italic>Journal of Conflict Resolution\u2019s<\/italic> policy on replication\u2019","volume":"4(1)","author":"B Russett","year":"2003","journal-title":"International Studies Perspectives"},{"key":"ref66","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1186\/1472-6920-10-2","article-title":"Perceived Stress, sources and severity of stress among medical undergraduates in a Pakistani Medical School","volume":"10","author":"M Shah","year":"2010","journal-title":"BMC Med Educ"},{"key":"ref67","doi-asserted-by":"crossref","first-page":"1023","DOI":"10.1097\/01.jom.0000237437.84513.92","article-title":"Contribution of burnout to the association between job strain and depression: the health 2000 study","volume":"48(10)","author":"K Ahola","year":"2006","journal-title":"J Occup Environ Med"},{"key":"ref68","doi-asserted-by":"crossref","first-page":"1248","DOI":"10.2466\/PR0.105.F.1248-1254","article-title":"Job stress, burnout, depression symptoms and physical health among Chinese university teachers","volume":"2)","author":"J Zhong","year":"2009","journal-title":"Psychol Rep 105(3 Pt"},{"key":"ref69","doi-asserted-by":"crossref","first-page":"329","DOI":"10.1539\/sangyoeisei.37.5_329","article-title":"The relationship between work factors and psychiatric symptoms: a comparison between anxiety and depression","volume":"37(5)","author":"K Tsukamoto","year":"1995","journal-title":"Sangyo Eiseigaku Zasshi"},{"key":"ref70","doi-asserted-by":"crossref","first-page":"72","DOI":"10.1007\/s00127-007-0267-z","article-title":"Two models of job stress and depressive symptoms. Results from a population-based study","volume":"43(1)","author":"N Dragano","year":"2008","journal-title":"Soc Psychiatry Psychiatr Epidemiol"},{"key":"ref71","doi-asserted-by":"crossref","first-page":"397","DOI":"10.1007\/s00420-008-0347-8","article-title":"Job stress and depressive symptoms among Korean employees: the effects of culture on work","volume":"82(3)","author":"SG Park","year":"2009","journal-title":"Int Arch Occup Environ Health"},{"key":"ref72","doi-asserted-by":"crossref","first-page":"f5266","DOI":"10.1136\/bmj.f5266","article-title":"Protecting students and promoting resilience","volume":"347","author":"C Fertleman","year":"2013","journal-title":"BMJ"},{"key":"ref73","first-page":"791","article-title":"Resilience and the burnout-engagement model in formal caregivers of the elderly","volume":"18(4)","author":"VA Menezes de Lucena","year":"2006","journal-title":"Psicothema"},{"key":"ref74","first-page":"185","article-title":"Cognitive-affective resilience indices as predictors of burnout and job-related outcome","volume":"10(3)","author":"GS Everly","year":"2008","journal-title":"Int J Emerg Ment Health"},{"key":"ref75","doi-asserted-by":"crossref","first-page":"81","DOI":"10.1177\/0193945909343293","article-title":"Influence of stress resiliency on RN job satisfaction and intent to stay","volume":"32(1)","author":"JH Larrabee","year":"2010","journal-title":"West J Nurs Res"},{"key":"ref76","doi-asserted-by":"crossref","first-page":"1482","DOI":"10.1111\/j.1365-2648.2011.05875.x","article-title":"Stress, resiliency, psychological empowerment and conflict management styles among baccalaureate nursing students","volume":"68(7)","author":"EW Pines","year":"2012","journal-title":"J Adv Nurs"},{"key":"ref77","doi-asserted-by":"crossref","first-page":"292","DOI":"10.1016\/j.ijnurstu.2011.09.015","article-title":"The presence of resilience is associated with a healthier psychological profile in intensive care unit (ICU) nurses: results of a national survey","volume":"49(3)","author":"M Mealer","year":"2012","journal-title":"Int J Nurs Stud"},{"key":"ref78","doi-asserted-by":"crossref","first-page":"293","DOI":"10.1002\/job.248","article-title":"Job demands, job resources and their relationship with burnout and engagement: a multi-sample study","volume":"25(3)","author":"WB Schaufeli","year":"2004","journal-title":"J Organ Behav"},{"key":"ref79","doi-asserted-by":"crossref","first-page":"92","DOI":"10.1186\/1472-6920-11-92","article-title":"Mental distress, alcohol use and help-seeking among medical and business students: a cross sectional comparative study","volume":"11","author":"M Dahlin","year":"2011","journal-title":"BMC Med Educ"}],"container-title":["PLoS ONE"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/dx.plos.org\/10.1371\/journal.pone.0087071","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,5,23]],"date-time":"2024-05-23T15:03:51Z","timestamp":1716476631000},"score":1,"resource":{"primary":{"URL":"https:\/\/dx.plos.org\/10.1371\/journal.pone.0087071"}},"subtitle":[],"editor":[{"given":"Marianna","family":"Mazza","sequence":"first","affiliation":[]}],"short-title":[],"issued":{"date-parts":[[2014,1,23]]},"references-count":79,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2014,1,23]]}},"URL":"https:\/\/doi.org\/10.1371\/journal.pone.0087071","relation":{},"ISSN":["1932-6203"],"issn-type":[{"value":"1932-6203","type":"electronic"}],"subject":[],"published":{"date-parts":[[2014,1,23]]}}}