1. Li Dak Sum & Yip Yio Chin Center for Stem Cells and Regenerative Medicine; School of Medicine; Zhejiang University; Hangzhou 310058 China
2. Zhejiang Provincial Key Research Institute of Medical Materials and Tissue Engineering; Hangzhou 310000 China
3. Department of Orthopaedics; The Second Affiliated Hospital; Zhejiang University; Hangzhou 310052 China
4. Department of Burn and Plastic Surgery; The Second Xiangya Hospital; Central South University; Changsha 410011 China
5. Department of Burn and Plastic Surgery; The Third Xiangya Hospital; Central South University; Changsha 410083 China
6. Clinical Research Center; The First Affiliated Hospital; School of Medicine; Zhejiang University; Hangzhou 310003 China