1. Department of Urology and Andrology, Ninth People's Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China and Department of Urology, Seoul National University Hospital, Seoul, Korea.
2. Laboratory of Veterinary Surgery, College of Veterinary Medicine, Chungbuk National University, Cheongju, Korea.
3. Department of Urology, Seoul National University Hospital, Seoul and Neuroscience Research Institute, Medical Research Center, Seoul National University, Seoul, Korea.