1. Newborn Screening Center, Department of Medical Genetics, Key Laboratory of Prevention and Control of Birth Defects, Liuzhou Maternity and Child Health Care Hospital, Affiliated Maternity Hospital and Affiliated Children's Hospital of Guangxi University of Science and Technology, Liuzhou, Guangxi 545000, P.R. China
2. School of Forensic Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
3. Newborn Screening Center, Huizhou Second Maternity and Child Health Care Hospital, Huizhou, Guangdong 516001, P.R. China