1 Department of Urology, MacKay Memorial Hospital, Taipei, Taiwan.
2 Department of Urology, MacKay Memorial Hospital, Taipei, Taiwan; School of Medicine, MacKay Medical College, New Taipei City, Taiwan. Electronic address: chihchiao.lee@gmail.com.
3 Department of Urology, MacKay Memorial Hospital, Taipei, Taiwan; School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.