1. Department of Neurosurgery, Center for Advanced Neurology and Neurosurgery (CEANNE), Porto Alegre 90560-010, Brazil
2. Postgraduate Program, Mackenzie Evangelical College of Parana, Curitiba 81531-980, Brazil
3. School of Dentistry of Ribeirao Preto, University of Sao Paulo, Ribeirão Preto 14040-904, Brazil
4. Pediatric Intensive Care Unit, Conceição Children’s Hospital, Porto Alegre 90560-010, Brazil