. 2016 Feb 15;82(5):580–588. doi: 10.1016/j.bjorl.2015.11.009
© 2016 Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial. Published by Elsevier Editora Ltda.
This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).