1. The Infectious Diseases Unit, Shaare-Zedek Medical Center and the Hebrew University School of Medicine, Jerusalem, Israel
2. Central Virology Laboratory, Ministry of Health, Chaim Sheba Medical center, Tel-Hashomer, Israel
3. Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
4. The Center for Travel and Tropical Medicine, Sheba Medical Center, Tel Hashomer, Israel
5. Clalit Health Services, Jerusalem, Israel