1. Speech-Language Pathologist, Voice Specialist, Hospital de Clinicas de Porto Alegre, Porto Alegre/RS, Brazil
2. Department of Otorhinolaryngology, University Hospital of Porto Alegre, Porto Alegre/RS, Brazil
3. Audiologist, Professor of Federal University of Rio Grande do Sul (UFRGS), Porto Alegre/RS, Brazil
4. Doctor of Science in Children's and Teenager's Health, Federal University of Rio Grande do Sul-UFRGS, Porto Alegre/RS, Brazil