1. Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P.R. China
2. College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
3. Department of General Surgery, China-Japan Friendship Hospital, Beijing 100029, P.R. China