{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T10:21:11Z","timestamp":1789726871411,"version":"4.0.1"},"reference-count":107,"publisher":"MJS Publishing, Medical Journals Sweden AB","issue":"sup332","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Acta Orthopaedica"],"published-print":{"date-parts":[[2009,1]]},"DOI":"10.1080\/17453690610046585","type":"journal-article","created":{"date-parts":[[2009,12,1]],"date-time":"2009-12-01T14:07:50Z","timestamp":1259676470000},"page":"1-33","source":"Crossref","is-referenced-by-count":19,"title":["Surgical advances in periacetabular osteotomy for treatment of hip dysplasia in adults"],"prefix":"10.2340","volume":"80","author":[{"given":"Anders","family":"Troelsen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1183","published-online":{"date-parts":[[2009,11,18]]},"reference":[{"key":"CIT0001","doi-asserted-by":"crossref","first-page":"119","DOI":"10.1016\/j.ocl.2005.12.001","volume":"37","author":"Lee MC","year":"2006","journal-title":"Orthop Clin N Am."},{"key":"CIT0002","doi-asserted-by":"crossref","first-page":"227","DOI":"10.1097\/00003086-199711000-00023","volume":"344","author":"Weinstein SL","year":"1997","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0003","doi-asserted-by":"crossref","first-page":"243","DOI":"10.1302\/0301-620X.88B2.16274","volume":"88","author":"Chung CY","year":"2006","journal-title":"J Bone Joint Surg Br."},{"key":"CIT0004","doi-asserted-by":"crossref","first-page":"101","DOI":"10.1097\/00003086-199205000-00016","volume":"278","author":"Shaw ED","year":"1992","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0005","first-page":"12","volume":"95","author":"Harrison TJ","year":"1961","journal-title":"J Anat."},{"key":"CIT0006","doi-asserted-by":"crossref","first-page":"575","DOI":"10.2106\/00004623-197860050-00001","volume":"60","author":"Ponseti IV","year":"1978","journal-title":"J Bone Joint Surg Am."},{"key":"CIT0007","doi-asserted-by":"crossref","first-page":"315","DOI":"10.1136\/jmg.7.4.315","volume":"7","author":"Wynne-Davies R","year":"1970","journal-title":"J Med Genet."},{"key":"CIT0008","doi-asserted-by":"crossref","first-page":"813","DOI":"10.1007\/s11999-008-0156-0","volume":"466","author":"Troelsen A","year":"2008","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0009","doi-asserted-by":"crossref","first-page":"267","DOI":"10.1007\/BF02341662","volume":"20","author":"Anda S","year":"1991","journal-title":"Skeletal Radiol."},{"key":"CIT0010","doi-asserted-by":"crossref","first-page":"533","DOI":"10.1007\/s007760070001","volume":"5","author":"Nakamura S","year":"2000","journal-title":"J Orthop Sci."},{"key":"CIT0011","doi-asserted-by":"crossref","first-page":"598","DOI":"10.1080\/17453670610012665","volume":"77","author":"Tallroth K","year":"2006","journal-title":"Acta Orthop."},{"key":"CIT0012","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1097\/00004728-199101000-00018","volume":"15","author":"Anda S","year":"1991","journal-title":"J Comput Assist Tomogr."},{"key":"CIT0013","doi-asserted-by":"crossref","first-page":"27","DOI":"10.1097\/01.blo.0000096819.67494.32","volume":"417","author":"Noble P","year":"2003","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0014","doi-asserted-by":"crossref","first-page":"239","DOI":"10.1097\/01.blo.0000201151.91206.50","volume":"446","author":"Jacobsen S","year":"2006","journal-title":"Clin Orthop Relat Res."},{"issue":"58","key":"CIT0015","first-page":"5","volume":"83","author":"Wiberg G","year":"1939","journal-title":"Acta Chir Scand."},{"key":"CIT0016","first-page":"26","volume":"232","author":"Ganz R","year":"1988","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0017","doi-asserted-by":"crossref","first-page":"73","DOI":"10.2106\/00004623-199501000-00010","volume":"77","author":"Trousdale RT","year":"1995","journal-title":"J Bone Joint Surg Am."},{"key":"CIT0018","first-page":"21","volume":"363","author":"Matta JM","year":"1999","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0019","doi-asserted-by":"crossref","first-page":"45","DOI":"10.1097\/00003086-199906000-00007","volume":"363","author":"Crockarell J","year":"1999","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0020","doi-asserted-by":"crossref","first-page":"54","DOI":"10.1097\/00003086-199906000-00008","volume":"363","author":"Trumble SJ","year":"1999","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0021","first-page":"38","volume":"74","author":"Pogliacomi F","year":"2003","journal-title":"Acta Bio Medica."},{"key":"CIT0022","doi-asserted-by":"crossref","first-page":"254","DOI":"10.2106\/JBJS.D.02093","volume":"87","author":"Clohisy J","year":"2005","journal-title":"J Bone Joint Surg Am."},{"key":"CIT0023","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-642-71038-4"},{"issue":"1","key":"CIT0024","doi-asserted-by":"crossref","first-page":"65","DOI":"10.2106\/00004623-200603001-00007","volume":"88","author":"Clohisy J","year":"2006","journal-title":"J Bone Joint Surg Am."},{"key":"CIT0025","doi-asserted-by":"crossref","first-page":"147","DOI":"10.1080\/00016470412331294395","volume":"75","author":"Mechlenburg I","year":"2004","journal-title":"Acta Orthop Scand."},{"key":"CIT0026","doi-asserted-by":"crossref","first-page":"1920","DOI":"10.2106\/JBJS.E.00515","volume":"88","author":"Peters CL","year":"2006","journal-title":"J Bone Joint Surg Am."},{"key":"CIT0027","doi-asserted-by":"crossref","first-page":"117","DOI":"10.1080\/00016470310013815","volume":"74","author":"S\u00f8balle K","year":"2003","journal-title":"Acta Orthop Scand."},{"key":"CIT0028","doi-asserted-by":"crossref","first-page":"268","DOI":"10.1302\/0301-620X.43B2.268","volume":"43","author":"Sharp I","year":"1961","journal-title":"J Bone Joint Surg Br."},{"key":"CIT0029","doi-asserted-by":"crossref","first-page":"767","DOI":"10.2106\/00004623-195032040-00004","volume":"32","author":"Heyman CH","year":"1950","journal-title":"J Bone Joint Surg Am."},{"key":"CIT0030","first-page":"505","volume":"20","author":"Goodman SB","year":"1990","journal-title":"Contemp Orthop"},{"key":"CIT0031","doi-asserted-by":"crossref","first-page":"810","DOI":"10.1259\/0007-1285-38-455-810","volume":"38","author":"Murray RO","year":"1965","journal-title":"Brit J Radiol."},{"key":"CIT0032","doi-asserted-by":"crossref","first-page":"502","DOI":"10.1055\/s-2001-19231","volume":"139","author":"N\u00f6tzli HP","year":"2001","journal-title":"Z Orthop."},{"key":"CIT0033","doi-asserted-by":"crossref","first-page":"12","DOI":"10.1080\/17453670710014699","volume":"79","author":"Okano K","year":"2008","journal-title":"Acta Orthopaedica."},{"key":"CIT0034","first-page":"1","volume":"7","author":"Jacobsen S","year":"2005","journal-title":"Skeletal Radiol."},{"key":"CIT0035","doi-asserted-by":"crossref","first-page":"423","DOI":"10.1302\/0301-620X.73B3.1670443","volume":"73","author":"Klaue K","year":"1991","journal-title":"J Bone Joint Surg Br."},{"key":"CIT0036","doi-asserted-by":"crossref","first-page":"1055","DOI":"10.1016\/j.arthro.2003.10.010","volume":"19","author":"Byrd JW","year":"2003","journal-title":"Arthroscopy"},{"key":"CIT0037","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1097\/01.blo.0000136903.01368.20","volume":"426","author":"Wenger DE","year":"2004","journal-title":"Clin Orthop Relat Res"},{"key":"CIT0038","doi-asserted-by":"crossref","first-page":"1448","DOI":"10.2106\/JBJS.D.02806","volume":"88","author":"Burnett RS","year":"2006","journal-title":"J Bone Joint Surg Am."},{"issue":"324","key":"CIT0039","first-page":"1","volume":"77","author":"Jacobsen S","year":"2006","journal-title":"Acta Orthop."},{"key":"CIT0040","doi-asserted-by":"crossref","first-page":"1004","DOI":"10.1080\/02841850701545839","volume":"48","author":"Troelsen A.","year":"2007","journal-title":"Acta Radiologica"},{"key":"CIT0041","first-page":"229","volume":"50","author":"Leunig M","year":"2001","journal-title":"Instr Course Lect."},{"key":"CIT0042","doi-asserted-by":"crossref","first-page":"18","DOI":"10.1097\/00003086-200401000-00004","volume":"418","author":"Garbuz DS","year":"2004","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0043","doi-asserted-by":"crossref","first-page":"308","DOI":"10.1136\/ard.50.5.308","volume":"50","author":"Croft P","year":"1991","journal-title":"Ann Rheum Dis."},{"key":"CIT0044","doi-asserted-by":"crossref","first-page":"179","DOI":"10.1136\/ard.54.3.179","volume":"54","author":"Smith RW","year":"1995","journal-title":"Ann Rheum Dis."},{"key":"CIT0045","doi-asserted-by":"crossref","first-page":"211","DOI":"10.1093\/rheumtology\/keh436","volume":"44","author":"Jacobsen S","year":"2005","journal-title":"Rheumatology (Oxford)."},{"key":"CIT0046","doi-asserted-by":"crossref","first-page":"471","DOI":"10.1302\/0301-620X.87B4.15522","volume":"87","author":"Jacobsen S","year":"2005","journal-title":"J Bone Joint Surg Br."},{"key":"CIT0047","doi-asserted-by":"crossref","first-page":"38","DOI":"10.1097\/00003086-199906000-00006","volume":"363","author":"Murphy SB","year":"1999","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0048","doi-asserted-by":"crossref","first-page":"721","DOI":"10.1302\/0301-620X.89B6.18805","volume":"89","author":"Garras DN","year":"2007","journal-title":"J Bone Joint Surg Br."},{"key":"CIT0049","doi-asserted-by":"crossref","first-page":"79","DOI":"10.1097\/00003086-198305000-00013","volume":"175","author":"Cooperman DR","year":"1983","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0050","doi-asserted-by":"crossref","first-page":"187","DOI":"10.1007\/BF00571474","volume":"111","author":"Hasegawa Y","year":"1992","journal-title":"Arch Orthop Trauma Surg."},{"key":"CIT0051","doi-asserted-by":"crossref","first-page":"985","DOI":"10.2106\/00004623-199507000-00002","volume":"77","author":"Murphy SB","year":"1995","journal-title":"J Bone Joint Surg Am."},{"key":"CIT0052","doi-asserted-by":"crossref","first-page":"953","DOI":"10.1016\/S0021-9290(00)00042-7","volume":"33","author":"Ferguson SJ","year":"2000","journal-title":"J Biomech"},{"key":"CIT0053","doi-asserted-by":"crossref","first-page":"171","DOI":"10.1016\/S0021-9290(02)00365-2","volume":"36","author":"Ferguson SJ","year":"2003","journal-title":"J Biomech"},{"key":"CIT0054","doi-asserted-by":"crossref","first-page":"25","DOI":"10.1097\/00003086-200112000-00004","volume":"393","author":"McCarthy JC","year":"2001","journal-title":"Clin Orthop Relat Res"},{"issue":"1","key":"CIT0055","doi-asserted-by":"crossref","first-page":"81","DOI":"10.1054\/arth.2001.28370","volume":"16","author":"McCarthy JC","year":"2001","journal-title":"J Arthroplasty"},{"key":"CIT0056","doi-asserted-by":"crossref","first-page":"16","DOI":"10.1097\/BLO.0b013e31815b181f","volume":"465","author":"Crawford MJ","year":"2007","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0057","doi-asserted-by":"crossref","first-page":"1025","DOI":"10.1016\/S0736-0266(02)00014-1","volume":"20","author":"Mavcic B","year":"2002","journal-title":"J Orthop Res."},{"key":"CIT0058","doi-asserted-by":"crossref","first-page":"6","DOI":"10.1186\/1749-799X-1-6","volume":"1","author":"Russell ME","year":"2006","journal-title":"J Orthop Surg."},{"key":"CIT0059","doi-asserted-by":"crossref","first-page":"884","DOI":"10.1007\/s11999-008-0145-3","volume":"466","author":"Mavcic B","year":"2008","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0060","doi-asserted-by":"crossref","first-page":"343","DOI":"10.2106\/00004623-197355020-00010","volume":"55","author":"Steel HH","year":"1973","journal-title":"J Bone Joint Surg Am."},{"key":"CIT0061","doi-asserted-by":"crossref","first-page":"808","DOI":"10.2106\/00004623-200305000-00006","volume":"85","author":"Schramm M","year":"2003","journal-title":"J Bone Joint Surg Am."},{"key":"CIT0062","doi-asserted-by":"crossref","first-page":"833","DOI":"10.1080\/17453670510045453","volume":"76","author":"Kralj M","year":"2005","journal-title":"Acta Orthop."},{"key":"CIT0063","doi-asserted-by":"crossref","first-page":"67","DOI":"10.1080\/00016470510030346","volume":"76","author":"Pogliacomi F","year":"2005","journal-title":"Acta Orthop Scand."},{"key":"CIT0064","doi-asserted-by":"crossref","first-page":"1633","DOI":"10.1007\/s11999-008-0242-3","volume":"466","author":"Steppacher SD","year":"2008","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0065","doi-asserted-by":"crossref","first-page":"9","DOI":"10.1097\/00003086-199906000-00003","volume":"363","author":"Siebenrock KA","year":"1999","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0066","doi-asserted-by":"crossref","first-page":"92","DOI":"10.1097\/00003086-199907000-00013","volume":"364","author":"Murphy SB","year":"1999","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0067","doi-asserted-by":"crossref","first-page":"134","DOI":"10.1097\/00003086-199907000-00018","volume":"364","author":"Hipp JA","year":"1999","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0068","doi-asserted-by":"crossref","first-page":"119","DOI":"10.1080\/00016470310013824","volume":"74","author":"Trousdale RT","year":"2003","journal-title":"Acta Orthop Scand."},{"key":"CIT0069","first-page":"64","volume":"363","author":"Hussell JG","year":"1999","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0070","doi-asserted-by":"crossref","first-page":"21","DOI":"10.1097\/00003086-199906000-00005","volume":"363","author":"Davey JP","year":"1999","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0071","first-page":"81","volume":"363","author":"Hussell JG","year":"1999","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0072","doi-asserted-by":"crossref","first-page":"93","DOI":"10.1097\/00003086-199906000-00012","volume":"363","author":"Myers SR","year":"1999","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0073","doi-asserted-by":"crossref","first-page":"591","DOI":"10.1080\/17453670610012656","volume":"77","author":"Hsieh PH","year":"2006","journal-title":"Acta Orthop."},{"key":"CIT0074","doi-asserted-by":"publisher","DOI":"10.1097\/00003086-199809000-00012"},{"key":"CIT0075","doi-asserted-by":"crossref","first-page":"317","DOI":"10.3109\/10929089709149831","volume":"2","author":"Langlotz F","year":"1997","journal-title":"Comput aided surg."},{"key":"CIT0076","doi-asserted-by":"crossref","first-page":"215","DOI":"10.3109\/10929080701541855","volume":"12","author":"Armiger RS","year":"2007","journal-title":"Comput Aided Surg."},{"key":"CIT0077","doi-asserted-by":"crossref","first-page":"168","DOI":"10.1097\/00003086-200212000-00021","volume":"405","author":"Murphy S","year":"2002","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0078","doi-asserted-by":"crossref","first-page":"1540","DOI":"10.2106\/JBJS.E.00572","volume":"88","author":"Cunningham T","year":"2006","journal-title":"J Bone Joint Surg Am."},{"key":"CIT0079","doi-asserted-by":"crossref","first-page":"1417","DOI":"10.2106\/JBJS.F.00493","volume":"89","author":"Clohisy JC","year":"2007","journal-title":"J Bone Joint Surg Am."},{"key":"CIT0080","doi-asserted-by":"crossref","first-page":"95","DOI":"10.5301\/HIP.2008.4955","volume":"18","author":"Atwal NS","year":"2008","journal-title":"Hip Int."},{"key":"CIT0081","doi-asserted-by":"crossref","first-page":"339","DOI":"10.1302\/0301-620X.84B3.12421","volume":"84","author":"van Bergayk AB","year":"2002","journal-title":"J Bone Joint Surg Br."},{"key":"CIT0082","doi-asserted-by":"crossref","first-page":"146","DOI":"10.1097\/00003086-200401000-00023","volume":"418","author":"Valenzuela RG","year":"2004","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0083","doi-asserted-by":"crossref","first-page":"48","DOI":"10.1097\/00003086-200401000-00009","volume":"418","author":"Mast JW","year":"2004","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0084","doi-asserted-by":"crossref","first-page":"91","DOI":"10.3109\/17453679608995620","volume":"67","author":"Sharrock NE","year":"1996","journal-title":"Acta Orthop Scand."},{"key":"CIT0085","doi-asserted-by":"crossref","first-page":"457","DOI":"10.1034\/j.1399-6576.2000.440418.x","volume":"44","author":"Niemi TT","year":"2000","journal-title":"Acta Anaesthesiol Scand."},{"key":"CIT0086","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1080\/00016470510030517","volume":"76","author":"Jacobsen S","year":"2005","journal-title":"Acta Orthop."},{"key":"CIT0087","author":"Okano K","year":"2008","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0088","doi-asserted-by":"crossref","first-page":"1447","DOI":"10.2106\/JBJS.G.00730","volume":"90","author":"Sharifi E","year":"2008","journal-title":"J Bone Joint Surg Am."},{"key":"CIT0089","doi-asserted-by":"crossref","first-page":"1448","DOI":"10.1080\/00016340600985032","volume":"85","author":"Larsson C","year":"2006","journal-title":"Acta Obstet Gynecol Scand."},{"key":"CIT0090","doi-asserted-by":"publisher","DOI":"10.1097\/01.AOG.0000137873.07820.34"},{"key":"CIT0091","doi-asserted-by":"crossref","first-page":"561","DOI":"10.2106\/00004623-200403000-00015","volume":"86","author":"Sehat KR","year":"2004","journal-title":"J Bone Joint Surg Br."},{"key":"CIT0092","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.88B8.17534"},{"key":"CIT0093","doi-asserted-by":"crossref","first-page":"721","DOI":"10.1080\/00016470410004094","volume":"75","author":"Jacobsen S","year":"2004","journal-title":"Acta Orthop Scand."},{"key":"CIT0094","doi-asserted-by":"crossref","first-page":"758","DOI":"10.1002\/jor.20380","volume":"25","author":"Jamali AA","year":"2007","journal-title":"J Orthop Res."},{"key":"CIT0095","doi-asserted-by":"crossref","first-page":"1318","DOI":"10.2106\/00004623-199309000-00007","volume":"75","author":"Konishi N","year":"1993","journal-title":"J Bone Joint Surg Am."},{"key":"CIT0096","first-page":"298","volume":"11","author":"Ball F","year":"1968","journal-title":"Ann Radiol (Paris)."},{"key":"CIT0097","doi-asserted-by":"crossref","first-page":"780","DOI":"10.1097\/01241398-199511000-00010","volume":"15","author":"Portinaro NM","year":"1995","journal-title":"J Pediatr Orthop."},{"key":"CIT0098","unstructured":"Kirkwood B, Sterne J. Essential medical statistics. 26: Survival analysis: displaying and comparing survival patterns. Blackwell, USA, UK, Australia 2003; 272\u2013286"},{"key":"CIT0099","doi-asserted-by":"publisher","DOI":"10.1080\/00016470410001213-1"},{"key":"CIT0100","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1080\/17453670710014923","volume":"79","author":"Larsen K","year":"2008","journal-title":"Acta Orthop."},{"key":"CIT0101","doi-asserted-by":"publisher","DOI":"10.1080\/17453670710014941"},{"key":"CIT0102","doi-asserted-by":"crossref","first-page":"307","DOI":"10.1016\/S0140-6736(86)90837-8","volume":"1","author":"Bland JM","year":"1986","journal-title":"Lancet."},{"key":"CIT0103","doi-asserted-by":"crossref","first-page":"85","DOI":"10.1002\/uog.122","volume":"22","author":"Bland JM","year":"2003","journal-title":"Ultrasound Obstet Gynecol."},{"key":"CIT0104","doi-asserted-by":"crossref","first-page":"909","DOI":"10.1302\/0301-620X.80B5.8708","volume":"80","author":"White J","year":"1998","journal-title":"J Bone Joint Surg Br."},{"key":"CIT0105","doi-asserted-by":"crossref","first-page":"237","DOI":"10.1097\/00003086-199202000-00035","volume":"275","author":"Larsson S","year":"1992","journal-title":"Clin Orthop Relat Res."},{"key":"CIT0106","doi-asserted-by":"crossref","first-page":"701","DOI":"10.2106\/JBJS.D.02645","volume":"87","author":"Ogonda L","year":"2005","journal-title":"J Bone Joint Surg Am."},{"key":"CIT0107","doi-asserted-by":"crossref","first-page":"62","DOI":"10.1097\/00003086-199307000-00009","volume":"292","author":"Letournel E","year":"1993","journal-title":"Clin Orthop Relat Res."}],"container-title":["Acta Orthopaedica"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/www.tandfonline.com\/doi\/pdf\/10.1080\/17453690610046585","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,12,19]],"date-time":"2024-12-19T01:49:15Z","timestamp":1734572955000},"score":1,"resource":{"primary":{"URL":"https:\/\/actaorthop.org\/actao\/article\/view\/18847"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2009,1]]},"references-count":107,"journal-issue":{"issue":"sup332","published-online":{"date-parts":[[2009,11,18]]},"published-print":{"date-parts":[[2009,1]]}},"alternative-id":["10.1080\/17453690610046585"],"URL":"https:\/\/doi.org\/10.1080\/17453690610046585","relation":{},"ISSN":["1745-3674","1745-3682"],"issn-type":[{"value":"1745-3674","type":"print"},{"value":"1745-3682","type":"electronic"}],"subject":[],"published":{"date-parts":[[2009,1]]}}}