1. Guangxi Key Laboratory of Metabolic Diseases Research, Guilin No. 924 Hospital, Guilin, Guangxi 541002, P.R. China
2. Reproductive Center, Guilin No. 924 Hospital, Guilin, Guangxi 541002, P.R. China
3. Clinical Medical Research Center, The Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, Guangdong 518020, P.R. China