1. Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.
2. Center for Adolescent Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.
3. Department of Pediatrics, Johns Hopkins School of Medicine, Baltimore, Maryland.
4. Department of Obstetrics & Gynecology, Johns Hopkins School of Medicine, Baltimore, Maryland.
5. Dow University of Health Science, Karachi, Pakistan.