1 Department of Gastroenterology, Hospital Civil de Guadalajara "Fray Antonio Alcalde", Guadalajara, Jalisco.
2 Department of Welfare and Sustainable Development, Centro Universitario del Norte, Universidad de Guadalajara, Colotlán, Jalisco.
3 Department of Internal Medicine, Hospital Civil de Guadalajara "Fray Antonio Alcalde", Guadalajara, Jalisco.
4 Health Sciences University Center, Universidad de Guadalajara, Guadalajara, Jalisco.
5 Department of Philosophical, Methodological and Instrumental Disciplines, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco.
6 Research Ethics Committee, Hospital Hispano, Guadalajara, Jalisco.
7 Department of Pharmacological Sciences, School of Medicine, National Polytechnic Institute, Ciudad de Mexico.
8 Division of Basic Health Disciplines, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco. Mexico.