1. Departamento de Cirugía, Facultad de Medicina, Universidad Nacional de Trujillo, Roma Avenue 338, Trujillo 13001, Peru
2. Faculty of Medicine, University of Ljubljana, Vrazov trg 2, 1000 Ljubljana, Slovenia
3. Department of Otorhinolaryngology and Cervicofacial Surgery, University Medical Centre Ljubljana, Zaloška 2, 1000 Ljubljana, Slovenia
4. Departamento de Cirugía, Especialidad de Otorrinolaringología, Hospital Belen de Trujillo, Bolivar Street 350, Trujillo 13001, Peru