1. Department of Otolaryngology and Head and Neck Surgery and Facial Surgery , Otorrino Autlan Gerardo Vargas Cardenas , Autlan, Jalisco , Mexico
2. Otolaryngology and Facial Surgery Department , National Autonomous University of Mexico , Puebla , Mexico
3. Cardiology Service. Ángeles Hospital , Puebla , Mexico
4. Otolaryngology Department , “Lic. Luis Donaldo Colosio Murrieta” Specialty Hospital Number 2, IMSS, Ciudad Obregon , Sonora , Mexico