1. Otorhinolaryngology Service, “Luis Donaldo Colosio Murrieta” Specialty Hospital No 2, Mexican Institute of Social Security , Ciudad Obregón , Sonora , Mexico
2. Mexican Institute of Social Security, Family Medicine Unit No.1 , Ciudad Obregón , Sonora , México
3. University of Sonora , Ciudad Obregón , Sonora , Mexico
4. University El Bosque , Bogotá , Colombia