1. Division of Intramural Population Health Research; Eunice Kennedy Shriver National Institute of Child Health and Human Development; National Institutes of Health; Bethesda Maryland
2. Division of Genetics; Wadsworth Center; New York State Department of Health; Albany New York
3. Department of Epidemiology; College of Public Health; The University of Iowa; Iowa City Iowa
4. Congenital Malformations Registry; New York State Department of Health; Albany New York
5. Department of Epidemiology and Biostatistics; University at Albany School of Public Health; Rensselaer New York
6. Genome Technology Branch; National Human Genome Research Institute; National Institutes of Health; Bethesda Maryland