1. Department of Urogenital Surgery, The Second Affiliated Hospital of the University of South China, Hengyang, Hunan, PR China;
2. Department of Urogenital Surgery, Nanhua Affiliated Hospital of the University of South China, Hengyang, Hunan, PR China;
3. Department of Urogenital Surgery, Kramayi Central Hospital, Kramayi, Xinjiang, PR China