1. Department of Urology, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China.
2. Department of Urology, Changzhou No. 2 People's Hospital Affiliated to Nanjing Medical University, Changzhou, Jiangsu, China.
3. Department of Nephro-Urology, Nagoya City University Graduate School of Medical Sciences, Mizuho-ku, Nagoya, Japan.