1. Department of Orthopedics, The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen 518033, P.R. China.
2. Department of Orthopedics, Sun Yat-Sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, P.R. China.
3. Center for Biotherapy, The Eighth Affiliated Hospital, Sun Yat-sen University, 3025# Shennan Road, Shenzhen 518000, P.R. China.