1. The Department of Hematology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel;
2. Sackler Faculty of Medicine, Tel Aviv University, Tel-Aviv, Israel;
3. Hebrew University Medical School, Jerusalem, Israel;
4. Internal Medicine “C” Tel Aviv Sourasky Medical Center, Tel Aviv, Israel;
5. Internal Medicine “E” Tel Aviv Sourasky Medical Center, Tel Aviv, Israel;
6. The Immunology Laboratory at Clalit Health Services, Tel-Aviv, Israel;
7. The Department of Epidemiology and Preventive Medicine, School of Public Health, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel;
8. Internal Medicine “D” Tel Aviv Sourasky Medical Center, Tel Aviv, Israel