1. Department of Radiation Medicine, College of Naval Medicine, Naval Medical University, Shanghai 200433, China
2. Department of Clinical Laboratory, Beidaihe Rehabilitation and Recuperation Center of PLA, Qinhuangdao 066100, China
3. Center of Reproductive Medicine, First Affiliated Hospital, Naval Medical University, Shanghai 200433, China
4. Department of Endocrinology, First Affiliated Hospital, Naval Medical University, Shanghai 200433, China
5. Administration Office for Undergraduates, Naval Medical University, Shanghai 200433, China