1 Department of Urology, Chung Shan Medical University Hospital, Taichung, Taiwan.
2 Department of Urology, Chung Shan Medical University Hospital, Taichung, Taiwan; School of Medicine, Chung Shan Medical University, Taichung, Taiwan.
3 Department of Urology, Chung Shan Medical University Hospital, Taichung, Taiwan; School of Medicine, Chung Shan Medical University, Taichung, Taiwan; Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan. Electronic address: flutewayne@gmail.com.