1: Joint Rheumatology Program, Clinical Immunology-Rheumatology Unit, 2nd Department of Medicine and Laboratory, National and Kapodistrian University of Athens School of Medicine, Hippokration General Hospital, Athens, Greece
2: Joint Rheumatology Program, 1st Propaedeutic Department of Medicine, National and Kapodistrian University of Athens School of Medicine, Laiko General Hospital, Athens, Greece
3: Joint Rheumatology Program, 4th Department of Medicine, National and Kapodistrian University of Athens School of Medicine, Attikon General Hospital, Athens, Greece
4: Rheumatology Department, Sismanoglio General Hospital, Athens, Greece