1. Department of Obstetrics and Gynecology; Faculty of Clinical Medicine; College of Medicine; Anambra State University; Awka Nigeria
2. University of Calabar; Calabar Nigeria
3. Institute of Tropical Disease; Research and Prevention; Calabar Nigeria
4. Department of Family Medicine; University of Calabar Teaching Hospital; Calabar Nigeria
5. Department of Pediatrics; University of Uyo Teaching Hospital; Uyo Akwa-Ibom Nigeria
6. Department of Pediatrics; University of Calabar Teaching Hospital; Calabar Nigeria