1. From the Division of Pediatric Otorhinolaryngology, Federal University of São Paulo (Drs Valera, Avelino, Pettermann, Fujita, Pignatari, and Weckx), São Paulo, Brazil.
2. From the Division of Otorhinolaryngology, School of Medicine of Ribeirão Preto, University of São Paulo (Dr Valera), São Paulo, Brazil.
3. From the Division of Polysonmography, Federal University of São Paulo (Drs Moreira, Pradella-Hallinan, and Tufik), São Paulo, Brazil.