1. Department of Urologic Surgery, Yunnan Cancer Hospital, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunan 650118, P.R. China
2. Department of Orthopedic and Trauma Surgery, Yunnan Second People's Hospital, The Fourth Affiliated Hospital of Kunming Medical University, Kunming, Yunan 650021, P.R. China
3. Department of Ultrasonic Diagnosis, Yunnan Cancer Hospital, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunan 650118, P.R. China
4. Department of Radiology, Yunnan Cancer Hospital, The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunan 650118, P.R. China