1. Tropical Health Department, High Institute of Public Health, Alexandria University, Egypt
2. WHO Expert Roster S073777, World Health Organization (EMRO), Egypt
3. College of Arts and Science, Ohio State University, Columbus Ohio, USA
4. Epidemiology Department, High Institute of Public Health, Alexandria University, Egypt
5. General Director of the General Administration of Alexandria University Health Care Units, Alexandria, Egypt
6. Internal Medicine Department, Faculty of Physiotherapy, Pharos University, Alexandria, Egypt