1. Department of Orthopaedics The First Affiliated Hospital, Medical College of Zhejiang University Hangzhou P. R. China
2. Department of Orthopaedics Xiangya Hospital Central South University, Hunan Engineering Research Center of Biomedical Metal and Ceramic Implants Changsha P. R. China
3. Department of Orthopaedics The Sixth Affiliated Hospital, Xinjiang Medical University Urumqi China