1. Department of Orthopedic Surgery, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
2. Beijing Novartis Pharma Ltd., Beijing 100004, P.R. China
3. Department of Public Health, Key Laboratory of Environment and Genes Related to Diseases, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
4. Department of Orthopedics, The First Clinical Medical College, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi 712000, P.R. China