Global Health Program, New York University School of Global Public Health, 14 East 4th St, RM300A, New York, NY 10003, USA. Department of Medical Library Services, NYU Grossman School of Medicine, 577 First Avenue, 2nd Floor, Room 202, New York, NY 10016, USA. Department of Obstetrics and Gynecology, Columbia University Irving Medical Center, 622 W 168th St, Rm PH16-74, New York, NY 10032, USA. Department of Pathology, Johns Hopkins School of Medicine, 600 N. Wolfe Street/Carnegie 446 D1, Baltimore, MD 21287, USA. Department of Obstetrics and Gynaecology, University of Abuja/University of Abuja Teaching Hospital, Gwagwalada, Abuja, Nigeria. Maternal and Newborn Healthcare Department, Comprehensive Community Based Rehabilitation in Tanzania (CCBRT), P.O. Box 23310, Dar es Salaam, Tanzania. National Blood Transfusion Service, Max Mbwana St, Box: 65019 DSM, Dar es Salaam, Tanzania. Centre of Excellence for Sickle Cell Disease Research and Training, Department of Haematology, University of Abuja, Abuja, Nigeria. Department of Social and Behavioral Sciences, New York University School of Global Public Health, 14 East 4th St, RM300A, New York, NY 10003, USA.