الإتاحة: https://discovery.ucl.ac.uk/id/eprint/10140728/1/annrheumdis-2021-221295.full.pdfTesthttps://discovery.ucl.ac.uk/id/eprint/10140728Test/
الإتاحة: https://doi.org/10.1016/j.jval.2016.03.1171Testhttps://api.elsevier.com/content/article/PII:S1098301516012390?httpAccept=text/plainTesthttps://api.elsevier.com/content/article/PII:S1098301516012390?httpAccept=text/xmlTest
الإتاحة: https://doi.org/10.1016/j.jval.2015.09.451Testhttps://api.elsevier.com/content/article/PII:S1098301515025279?httpAccept=text/xmlTesthttps://api.elsevier.com/content/article/PII:S1098301515025279?httpAccept=text/plainTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=core_ac_uk__::fd5ca78c25eecba78baab40e218dd079Test