1. Section of Speech-Language Pathology, Instituto Nacional do Câncer (INCA), Rio de Janeiro, Brazil
2. Molecular Carcinogenesis Program, Instituto Nacional do Câncer, Rio de Janeiro, Brazil
3. Section of Speech-Language Pathology, Hospital A.C. Camargo, São Paulo, Brazil
4. Pediatric Oncology Service, Instituto Nacional do Câncer, Rio de Janeiro, Brazil
5. Department of Pediatrics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil