1. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, P. R. China
2. National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510641, P. R. China
3. Department of Clinical Laboratory, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P. R. China
4. Metallic Materials Surface Functionalization Engineering Research Center of Guangdong Province, South China University of Technology, Guangzhou 510641, P. R. China