1 National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, GA, USA.
2 Division of Laboratory Services, Newborn Screening and Molecular Biology Branch, Centers for Disease Control and Prevention, Atlanta, GA, USA.
3 Division of Laboratory Services, Newborn Screening and Molecular Biology Branch, Centers for Disease Control and Prevention, Atlanta, GA, USA; Association of Public Health Laboratories, Silver Spring, MD, USA.
4 Association of Public Health Laboratories, Silver Spring, MD, USA.
5 Department of Pediatrics, Nationwide Children's Hospital, Columbus, OH, USA.
6 Center for Public Health Innovation, CI International, Littleton, CO, USA.
7 National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, GA, USA. Electronic address: sshapira@cdc.gov.