1. Association for Assistance of Disabled Children Recife Brazil
2. Barāo de Lucena Hospital Recife Brazil
3. Federal University of Pernambuco Recife Brazil
4. Restauração Hospital Recife Brazil
5. National Center on Birth Defects and Developmental DisabilitiesCenters for Disease Control and Prevention Atlanta Georgia
6. College of Medicine, Department of PediatricsUniversity of Florida Gainesville Florida
7. College of Medicine and College of Public Health and Health Professions, Department of EpidemiologyUniversity of Florida Gainesville Florida