1. Department of Pediatrics; Division of Neonatology and Developmental Medicine; Stanford University School of Medicine; Stanford California
2. Centers for Disease Control and Prevention; Atlanta; Georgia
3. Department of Pediatrics; University of Washington School of Medicine and Seattle Children's Craniofacial Center; Seattle Washington
4. Congenital Malformations Registry; New York State Department of Health; Albany New York
5. University at Albany School of Public Health; Rensselaer New York
6. Department of Medicine; Division of Endocrinology; Gerontology and Metabolism, Stanford University School of Medicine; Stanford California
7. UCSF Benioff Children's Hospital Oakland; Oakland; California