1. Rheumatic Disease Unit, Israel, Department of Medicine 'B', Soroka Medical Centre and Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva
2. Department of Medicine 'B', Soroka Medical Centre and Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva
3. Department of Medicine 'B', Chaim-Sheba Medical Centre, Tel-Hashomer and Sackler Faculty of Medicine, Tel-Aviv University, Israel