1. Department of Rheumatology, Asclepeion Hospital, Voula, GR16673 Athens, Greece
2. Department of Physiology, Medical School, University of Athens, GR11527 Athens, Greece
3. Department of Endocrinology, Asclepeion Hospital, Voula, GR16673 Athens, Greece
4. Zabludowicz Center for Autoimmune Diseases, Sheba Medical Center, Tel Aviv University, Tel Aviv 69978, Israel