1 Department of Orthopaedics, Chinese People's Liberation Army General Hospital (301 Hospital), Beijing, People's Republic of China.
2 School of Medicine, Nankai University, Tianjin, 300071, People's Republic of China.
3 Department of Orthopaedics, Chinese People's Liberation Army General Hospital (301 Hospital), Beijing, People's Republic of China. stevelee301@163.com.
4 Anesthesia/Surgery Center, Chinese People's Liberation Army General Hospital (301 Hospital), Beijing, People's Republic of China.
5 Department of Orthopaedics, Chinese People's Liberation Army General Hospital (301 Hospital), Beijing, People's Republic of China. jiyingchen_301@163.com.