1. Rheumatology Unit; The Chaim Sheba Medical Center; Tel-Hashomer Israel
2. Sackler Faculty of Medicine; Tel Aviv University; Tel Aviv Israel
3. Internal Medicine D; Meir Hospital; Kfar Saba Israel
4. Department of Epidemiology and Preventive Medicine; Tel Aviv University; Tel Aviv Israel
5. Department of Internal Medicine D; The Chaim Sheba Medical Center; Tel-Hashomer Israel