1 Beijing Key Laboratory of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Institute of Orthopedics, Chinese PLA General Hospital, Beijing, China.
2 School of Medicine, Nankai University, Tianjin, China.
3 Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Department of Orthopaedic Surgery, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.