1.
Ray-Offor E, Obiorah C. Upper Gastro-Intestinal Endoscopy in Port-Harcourt: An Audit. The Nig Health J [Internet]. 2015 Dec. 13 [cited 2024 May 20];13(4):192. Available from: https://www.tnhjph.com/index.php/tnhj/article/view/119