1. Endemic Medicine Department; Faculty of Medicine; Helwan University; Cairo Egypt
2. Unité d’Epidémiolotie des Maladies Emergentes; Institut Pasteur; Paris France
3. Internal Medicine Department; Faculty of Medicine; Ain Shams University; Cairo Egypt
4. Internal Medicine Department; Faculty of Medicine; Cairo University; Cairo Egypt
5. Department of Tropical Medicine; Faculty of Medicine; Al-Azhar University; Damietta Egypt
6. Endemic Medicine and Hepatology Department; Faculty of Medicine; Cairo University; Cairo Egypt
7. PACRI Unit; Conservatoire National des Arts et Métiers; Paris France