1. Department of Andrology; Jingling Hospital; School of Medicine; Nanjing University; Nanjing China
2. Family Planning Research Institute/Center of Reproductive Medicine; Tongji Medical College; Huazhong University of Science and Technology; Wuhan China
3. Clinical laboratory; People's hospital of Jinhu County; Huai'an China
4. Center of Reproductive Medicine; Xi'an No. 4 hospital/GuangRen hospital of Xi'an Jiaotong University; Xi'an China
5. Center of Reproductive Medicine; The first affiliated hospital of Wenzhou Medical University; Wenzhou China
6. Department of Urology; People's hospital of Jinhu County; Huai'an China