Ekele Bissallah Ahmed, Ahmed Yakubu, Nnadi Daniel, Ishaku Kabiru
Department of Obstetrics and Gynecology, Usmanu Danfodiyo University Teaching Hospital, Sokoto, Nigeria.
Acta Obstet Gynecol Scand. 2005 Jul;84(7):701-2. doi: 10.1111/j.0001-6349.2005.0383a.x.