1. Department of Urology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.
2. Department of Respiratory and Critical Care Medicine, the Second Affiliated Hospital of Anhui Medical University, Hefei, China.
3. Department of Urology, The First Affiliated Hospital of Wannan Medical College, Wuhu, Anhui, China.
4. Andrology Center, Peking University First Hospital, Beijing, China.