1. College of Biomedical Engineering School of Chemical Engineering Sichuan University Chengdu 610065 China
2. State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China
3. Department of Mechanical Engineering The University of Hong Kong Hong Kong 999077 China
4. Department of Ophthalmology The University of Hong Kong Hong Kong 999077 China
5. State Key Laboratory of Oral Diseases National Clinical Research Center for Oral Disease Department of Orthodontics and Pediatrics West China Hospital of Stomatology Sichuan University Chengdu 610064 China
6. Department of Materials Imperial College London London SW7 2AZ UK
7. Department of Biomedical Engineering The City College of City University of New York New York NY 10031 USA
8. Science and Technology Achievement Incubation Center Kunming Medical University Kunming 650500 China
9. National Engineering Research Center for Biomaterials College of Biomedical Engineering Sichuan University Chengdu 610064 China