1 Department of Othopaedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107# Yanjiangxi Road, Guangzhou, 510120, PR China.
2 Biotherapy Centre, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107# Yanjiangxi Road, Guangzhou, 510120, PR China.
3 Department of Othopaedics, Guangdong Provincial People Hospital, 106# Zhongshan Road 2, Guangzhou, 510080, PR China.
4 Biotherapy Centre, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107# Yanjiangxi Road, Guangzhou, 510120, PR China. sunfox809@yahoo.com.cn.
5 Biotherapy Centre, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107# Yanjiangxi Road, Guangzhou, 510120, PR China. shenhuiyong@yahoo.com.cn.