1 Joint and Orthopaedics Trauma, Department of Orthopedics, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.
2 VA Palo Alto Health Care System, Stanford University Medical School, Palo Alto, CA, United States.
3 Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, Cancer Center, The First Hospital of Jilin University, Changchun, Jilin, China.
4 Department of Plastic Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.