1. Department of Endocrinology, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China
2. Department of Urology, The First Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
3. Department of Andrology, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China
4. Department of Urology, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China