1. Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa.
2. Public Policy Center, University of Iowa, Iowa City, Iowa.
3. Public Policy Center, Department of Preventive and Community Dentistry, College of Dentistry, University of Iowa, Iowa City, Iowa.
4. Congenital Malformations Registry, New York State Department of Health, Albany, New York.
5. Departments of Pediatrics and Psychiatry, and Associate Director, Center for Applied Research and Evaluation (CARE), University of Arkansas for Medical Sciences, Little Rock, Arkansas.
6. National Foundation for Facial Reconstruction, New York, New York.