Institution: | 1. Department of Public Health Sciences, University of California, Davis, California;2. Department of Epidemiology, University of Iowa, Iowa City, Iowa;3. Departments of Pediatrics and Biology, University of Iowa, Iowa City, Iowa;4. Congenital Malformations Registry, New York State Department of Health, Troy, New York;5. National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia |