1. Department of Biomaterials; Key Laboratory of Biomedical Engineering of Fujian Province; Fujian Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources; State Key Lab of Physical Chemistry of Solid Surface; College of Materials; Xiamen University; Xiamen 361005 P. R. China
2. State Key Laboratory of Molecular Vaccinology and Molecular Diagnosis & Center for Molecular Imaging and Translational Medicine; School of Public Health; Xiamen University; Xiamen 361102 P. R. China
3. Medical College; Xiamen University; Xiamen 361102 P. R. China
4. Chinese Center for Disease Control & Prevention Institute for Viral Disease Control & Prevention; Beijing 102206 P. R. China