1. Guangxi Center for Birth Defects Research and Prevention Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region Nanning Guangxi P.R. China
2. Department of Clinical Genetics Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region Nanning Guangxi P.R. China
3. Department of Genetic and Metabolic Central Laboratory Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region Nanning Guangxi P.R. China