1. Department of Surgery, Division of Urology, Taichung Veterans General Hospital, Taichung 40705, Taiwan, R.O.C.
2. Department of Urology, China Medical University Hospital, Taichung 404332, Taiwan, R.O.C.
3. Department of Urology, Tungs' Taichung Metro Harbor Hospital, Taichung 43503, Taiwan, R.O.C.