1. Dr. Henrique Santillo Rehabilitation and Readaptation Center, Goiânia, Brazil
2. Oswaldo Cruz University Hospital, Recife, Brazil
3. Association for Assistance of Disabled Children, Recife, Brazil
4. Hospital Infantil Albert Sabin, Fortaleza, Brazil
5. Centro de Pesquisas Aggeu Magalhães Fiocruz, Recife, Brazil
6. Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil