1: Joint Rheumatology Program, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
2: Rheumatology Clinic, University of Ioannina, Ioannina, Greece
3: Clinical Immunology and Allergy Department, University of Crete, Heraklion, Greece
4: Rheumatology Unit, KAT Hospital, Athens, Greece
5: Rheumatology Unit, Sismanoglio Hospital, Athens, Greece
6: Department of Rheumatology, University of Thessaly, Larissa, Greece
7: 4th Department of Medicine, Aristotle University, Thessaloniki, Greece
8: 401 General Military Hospital, Athens, Greece
9: Rheumatology Unit, NIMTS Hospital, Athens, Greece
10: Private Practice, Greece
11: Rheumatology Unit, Agios Andreas Hospital, Patras, Greece
12: Rheumatology Unit, Navy Hospital, Athens, Greece
13: Hygeia Hospital, Athens, Greece