1First Department of Propaedeutic Internal Medicine, National and Kapodistrian University of Athens, "Laiko" General Hospital, Athens
2Rheumatology Unit, Fourth Department of Propaedeutic Internal Medicine, National and Kapodistrian University of Athens, “Attikon” University Hospital, Athens
3Department of Rheumatology, “Asklepieion” General Hospital, Athens, Greece
4Rheumatology Unit, Sismanogleio General Hospital, Athens, Greece
5Department of Rheumatology, “G. Gennimatas” General Hospital, Athens, Greece
6First Department of Internal Medicine, University Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis, Greece
7Fourth Department of Internal Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
8Clinical Immunology-Rheumatology Unit, 2nd Department of Medicine and Laboratory, National and Kapodistrian University of Athens, Athens, Greece
9Rheumatology and Clinical Immunology, University of Crete Medical School and University Hospital of Iraklio, Iraklio, Greece
P Sidiropoulos, D Boumpas, G Bertsias, M Tektonidou, A Fanouriakis