| Affiliation: | 1. National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia;2. Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee;3. Duke Cleft and Craniofacial Center;4. Division of Plastic, Maxillofacial and Oral Surgery;5. , Duke University Hospital and Children's Health Center, Durham, North Carolina;6. Birth Defects Surveillance Program, Department of Community and Family Health, College of Public Health, University of South Florida, Tampa, Florida;7. Florida Birth Defects Registry, Bureau of Epidemiology, Division of Disease Control and Health Protection, Florida Department of Health, Tallahassee, Florida |
