1. Department of Population Dynamics, Johns Hopkins School of Public Health, 615 North Wolfe Street, Baltimore, MD, 21205-2179
2. Department of Community Medicine, Suez Canal University
3. Child and Women Research Division, Central Agency for Public Mobilization and Statistics (CAPMAS)
4. ARI Division, Child Survival Project, Ministry of Health
5. Department of International Health, Johns Hopkins School of Public Health, Baltimore