1. School of Materials Science & Engineering, South China University of Technology, Guangzhou 510006, China
2. Department of Colorectal Surgery, the Sixth Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510655, China
3. National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
4. School of Medicine, South China University of Technology, Guangzhou 510006, China
5. Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou 510006, China
6. School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China