Editor Yu-jie Liu is a surgeon and professor at the Department of Orthopedics, Chinese PLA General Hospital, Beijing, China. Editor Chun-bao Li is a surgeon at the same department. Editor Jing Xue is a surgeon at the Department of Orthopedics, Air Force Medical Center, Beijing, China. Editor Chang-ming Huang is a surgeon at the Department of Orthopedics, The 73 Group Army Hospital (The Affiliated Cheng-gong Hospital of Xiamen University), Xiamen, China.