NJBCS, Author. Diagnostic upper Gastrointestinal Endoscopy in Kaduna, Northwest Nigeria. Nigerian Journal of Basic and Clinical Sciences, Nigeria, v. 20, n. 1, 2026. DOI: 10.65843/34gfgd07. Disponível em: https://njbcs.ng/index.php/njbcs/article/view/1162. Acesso em: 2 may. 2026.