1.
Ramírez-Mendoza P, González-Angulo J, Ángeles-Garay U, Segovia-Cuevas GA. Evaluation of Gastric Atrophy. Comparison between Sidney and OLGA Systems. Rev Med Inst Mex Seguro Soc. 2021;46(2):135-139. Accessed November 11, 2026. https://revistamedica.imss.gob.mx/index.php/revista_medica/article/view/2675