1. Department of Internal Medicine F and the Rheumatology Unit, Chaim Sheba Medical Centre, Tel-Hashomer, Israel
2. Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
3. Department of Pathology, Chaim Sheba Medical Centre, Tel-Hashomer, Israel
4. Department of Internal Medicine D and the Rheumatology Unit, Chaim Sheba Medical Centre, Tel-Hashomer, Israel