1. National Center on Birth Defects and Developmental Disabilities; Centers for Disease Control and Prevention; Atlanta Georgia
2. Carter Consulting; Atlanta Georgia
3. Division of Medical Genetics, Department of Pediatrics; University of Utah Health Sciences Center; Salt Lake City Utah
4. Birth Defects Epidemiology and Surveillance Branch; Texas Department of State Health Services; Austin Texas
5. University of Mississippi Medical Center; Jackson Mississippi
6. Colorado Department of Public Health and Environment; Denver Colorado
7. College of Public Health; University of South Florida; Tampa Florida