1. Department of Pediatrics (Neonatal‐Perinatal Medicine), Arkansas Children's Hospital University of Arkansas for Medical Sciences Little Rock Arkansas USA
2. Department of Epidemiology Fay W. Boozman College of Public Heath, University of Arkansas for Medical Sciences Little Rock Arkansas USA
3. Arkansas Center for Birth Defects Research and Prevention Little Rock Arkansas USA
4. Arkansas Research Institute Arkansas Children's Hospital Little Rock Arkansas USA
5. Department of Health Policy and Management, Fay W. Boozman College of Public Heath University of Arkansas for Medical Sciences Little Rock Arkansas USA