1. Department of Laboratory Medicine, Capital Medical University, Beijing Obstetrics and Gynecology Hospital, Beijing, China
2. Department of Pathology, Arkansas Children’s Hospital, Little Rock, AR, USA;
3. Newborn Screening Center, Capital Medical University, Beijing Obstetrics and Gynecology Hospital, Beijing, China
4. Central Laboratory, Capital Medical University, Beijing Obstetrics and Gynecology Hospital, Beijing, China