| Affiliation: | 1. N.C. Division of Public Health, Birth Defects Monitoring Program, State Center for Health Statistics, Raleigh, North Carolina;2. Correspondence to:;3. Robert E. Meyer, PhD, State Center for Health Statistics, N.C. Division of Public Health, 222 N. Dawson St., Cotton Building, Raleigh, NC 27603.;4. E‐mail:;5. Department of Epidemiology and Biostatistics, University of Albany, State University of New York, Albany, New York;6. National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia;7. Texas Department of State Health Services, Birth Defects Epidemiology and Surveillance Branch, Austin, Texas;8. Departments of Pediatrics and Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina;9. Arizona Department of Health Services, Birth Defects Monitoring Program, Phoenix, Arizona;10. New York State Department of Health, Office of Primary Care and Health System Management, Albany, New York |
