1. Otorhinlaryngology Service, “Lic. Luis Donaldo Colosio Murrieta” Specialty Hospital No. 2, Mexican Institute of Social Security, Ciudad Obregón, Sonora , Mexico
2. Family Medicine Medical Hospital No. 1, Mexican Institute of Social Security, Ciudad Obregón , Sonora , Mexico
3. School of Medicine , El Bosque University , Bogotá , Colombia
4. Social Service , University of Sonora , Campus Cajeme, Ciudad Obregón, Sonora , Mexico