1. Department of Urology, The First Hospital of Putian City, Putian, Fujian 351100, P.R. China
2. Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
3. Department of Urology, Shangrao Municipal Hospital, Shangrao, Jiangxi 334000, P.R. China