Department of Urology;
Shanghai Human Sperm Bank;
Shanghai Institute of Andrology;
Renji Hospital Shanghai Jiao Tong University School of Medicine;
Shanghai 200001;
China;
Instinrte of Human Reproduction and Stem Cell Engineering;
Human Sperm Bank;
Central South University Changsha 410078;
China;
Zhejiang Institute of Planned Parenthood Research & Zhejiang Human Sperm Bank;
Hangzhou 310012;
China;
jinghua Hospital;
Shenyang East Group;
Shenyang Reproductive Medicine Centre;
Shenyang 110005;
China;