1. Center for Medical Genetics and Prenatal Diagnosis, People’s Hospital of Guangxi Zhuang Autonomous Region, Nanning, People’s Republic of China
2. Department of Clinical Laboratory, The Second Women and Children Care Hospital of Nanning, Nanning, People’s Republic of China
3. Department of Clinical Laboratory, Jiangbin Hospital of Guangxi Zhuang Autonomous Region, Nanning, People’s Republic of China