1 Research Center for Nano-Biomaterials and Regenerative Medicine, College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, China.
2 State Key Laboratory of Polymer Materials Engineering, School of Chemical Engineering, Sichuan University, Chengdu, China.
3 Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, United States.
4 Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China.