Affiliation: | 1. Department of Epidemiology, Human Genetics and Environmental Sciences, University of Texas School of Public Health, Southwest Center for Occupational and Environmental Health, Houston, Texas;2. Department of Pediatrics, Section of Hematology‐Oncology, Baylor College of Medicine, Houston, Texas;3. National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia;4. Birth Defects Epidemiology and Surveillance Branch, Texas Department of State Health Services, Austin, Texas;5. Department of Biostatistics, University of Texas School of Public Health, Houston, Texas |