1. Department of Rheumatology, Asclepeion Hospital, Voula, Athens, Greece
2. Department of Endocrinology, Asclepeion Hospital, Voula, Athens, Greece
3. Department of Rheumatology, St Paul’s Hospital, Thessaloniki, Greece
4. Department of Immunology, St Paul’s Hospital, Thessaloniki, Greece
5. Department of Physiology, Medical School, University of Athens, Athens, Greece