1. 1st Department of Propaedeutic and Internal Medicine, Joint Rheumatology Program, Laiko Hospital, Medical School, National and Kapodistrian University of Athens, 17 Agiou Thoma Str., Athens, 11 527, Greece
2. Rheumatology Clinic Naval Hospital of Athens, Athens, Greece
3. Rheumatology Department, G.Gennimatas General Hospital, Athens, Attica, Greece
4. Academic Research Fellow Hippokration Hospital Thessaloniki, Thessaloniki, Greece
5. Rheumatologist, Private practice, Kifissia, Athens, Greece
6. Rheumatologist, Metropolitan general Hospital Athens, Cholargos, Athens, Greece
7. Rheumatologist, Private practice, Karterini, Greece
8. employee of AbbVie Pharmaceuticals S.A., Neo Iraklio, Athens, Greece