Affiliation: | Mauricio Garcia-Saenz-de-Sicilia, Francisco Sanchez-Avila, Roberto Ruiz-Cordero, Department of Gastroenterology, Instituto Nacional de Ciencias Medicas y Nutrición Salvador Zubiran, Mexico City, Mexico;Gustavo Lopez-Arce, Felix I Tellez-Avila, Endoscopy Department, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Mexico City, 14000, Mexico;Norberto C Chavez-Tapia, Sandra Garcia-Osogobio, Medica Sur Clinic and Fundation, Mexico City, México |