1. Clinical Microbiology, Emek Medical Center, Clalit Health Services, Afula, Israel
2. Department of Epidemiology and Preventative Medicine, School of Public Health, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
3. Clinical Microbiology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
4. Infectious Diseases Unit, Emek Medical Center, Clalit Health Services, Afula, Israel
5. Clalit Health Services, Jerusalem, Israel
6. Rappaport Faculty of Medicine, The Technion-Israel Institute of Technology, Haifa, Israel