1. Center for Birth Defects Research and Prevention, Massachusetts Department of Public Health Boston Massachusetts USA
2. National Center on Birth Defects and Developmental Disabilities Centers for Disease Control and Prevention Atlanta Georgia USA
3. Oak Ridge Institute for Science and Education Oak Ridge Tennessee USA
4. Birth Defects Epidemiology and Surveillance Branch Texas Department of State Health Services Austin Texas USA
5. Congenital Malformations Registry New York State Department of Health Albany New York USA
6. Arkansas Reproductive Health Monitoring System Arkansas Children's Research Institute Little Rock Arkansas USA
7. College of Public Health University of South Florida Tampa Florida USA
8. Department of Pediatrics, Division of Cardiology UT Southwestern Medical Center Dallas Texas USA
9. Department of Epidemiology, Fay W. Boozman College of Public Health University of Arkansas for Medical Sciences and Arkansas Center for Birth Defects Research and Prevention Little Rock Arkansas USA
10. Department of Epidemiology, College of Public Health University of Iowa Iowa City Iowa USA
11. Department of Pediatrics, Section of Hematology‐Oncology Baylor College of Medicine Houston Texas USA