Etonyeaku, A., Agbakwuru, E., Akinkuolie, A., Omotola, C., Talabi, A., Onyia, C., Kolawole, O., & Aladesuru, O. (2014). A review of the management of perforated duodenal ulcers at a tertiary hospital in south western Nigeria. African Health Sciences, 13(4), 907–913. https://doi.org/10.4314/ahs.v13i4.7