Affiliation: | 1. Division of Epidemiology, Human Genetics and Environmental Sciences, University of Texas, School of Public Health, , Houston, Texas;2. Department of Pediatrics, Section of Hematology‐Oncology, Baylor College of Medicine, , Houston, Texas;3. Institute of Health Policy, University of Texas, School of Public Health, , Houston, Texas;4. Texas Department of State Health Services, Birth Defects Epidemiology and Surveillance Branch, , Austin, Texas;5. Environmental Defense Fund, , Austin, Texas |