1. The Key Laboratory of Biomedical Information Engineering of Ministry of Education School of Life Science and Technology Xi'an Jiaotong University Xi'an 710049 P. R. China
2. Bioinspired Engineering and Biomechanics Center (BEBC) Xi'an Jiaotong University Xi'an 710049 P. R. China
3. School of Life and Health Sciences The Chinese University of Hong Kong Shenzhen 518172 P. R. China
4. Department of Burns and Plastic Surgery Second Affiliated Hospital of Air Force Military Medical University Xi'an 710038 P. R. China
5. Department of Chemistry University of Oxford Oxford OX1 3QZ UK
6. The Second Affiliated Hospital Xi'an Medical University Xi'an 710038 P. R. China