1. National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China
2. Nanjng University of Chinese Medicine, Nanjng 210000, P. R. China
3. Department of Orthopedics, Taizhou Municipal Hospital, Taizhou 318000, P. R. China
4. Engineering Research Center of the Ministry of Education for Wound Repair Technology, Jiangnan University, The Affiliated Hospital of Jiangnan University, Wuxi 214041, P. R. China
5. Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, USA