1. Department of Graduate, Hebei North University, No. 11 Diamond South Road, High-tech Zone, Zhangjiakou 075000, Hebei, China
2. Department of Orthopedics, The Eighth Medical Center of the Chinese PLA General Hospital, Beijing 100091, China
3. Department of Orthopedics, The Fourth Medical Center of the Chinese PLA General Hospital, Beijing 100037, China
4. School of Light Industry, Beijing Technology and Business University, 11 Fucheng Road, Haidian District, Beijing 100048, China