RAY-OFFOR, Emeka; OBIORAH, Christopher. Upper gastro-intestinal endoscopy in Port-Harcourt, Nigeria: an Audit. The Nigerian Health Journal, [S. l.], v. 14, n. 3, p. 134, 2015. Disponível em: https://tnhjph.com/index.php/tnhj/article/view/171. Acesso em: 30 apr. 2024.