1. Department of Urology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
2. Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, China
3. Department of Orthopedics, The Second Affiliated Hospital of Zunyi Medical University, Zunyi, China
4. Graduated School of Medicine, Shimane University, Izumo, Japan