1. Orthopedics Dept. of 1st Affiliated Hospital, GuangZhou Medical University, GuangDong, China;
2. Orthopedics Dept. of HuiDong People’s Hospital, HuiZhou, GuangDong, China;
3. Dept. of Clinical Physics and Bioengineering, University of Glasgow, Glasgow, U.K;
4. Neural Electrophysiology Lab, University of Hongkong, Hongkong;
5. Traumatic Orthopedics Dept. of SanShui People’s Hospital, FoShan, GuangDong, China