1. Medical Research Center, Sun Yat-Sen Memorial Hospital , Sun Yat-Sen University , Guangdong Province , China
2. Guangzhou laboratory , Guangzhou , Guangdong Province , China
3. Center for Reproductive Genetics and Reproductive Medicine, Sun Yat-Sen Memorial Hospital , Sun Yat-Sen University , Guangzhou , Guangdong Province , China
4. Reproductive Medicine Center, Sun Yat-sen Memorial Hospital , Sun Yat-sen University , Guangzhou , Guangdong Province , China