1. Florida Birth Defects Registry, Public Health Research Unit, Division of Community Health Promotion, Florida Department of Health, Tallahassee, Florida;
2. Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina;
3. Birth Defects Surveillance Program and
4. Lawton and Rhea Chiles Center for Healthy Mothers and Babies, College of Public Health and
5. Department of Obstetrics and Gynecology, Morsani College of Medicine, University of South Florida, Tampa, Florida; and
6. Department of Pediatrics, College of Medicine – Jacksonville, University of Florida, Jacksonville, Florida