Experimental Center of Molecular and Cellular Biology;
School of Medicine;
Zhejiang University;
Hangzhou 310006. China;
Institute of Infectious Diseases;
the First Affiliated Hospital;
School of Medicine;
Zhejiang University;
Hangzhou 310003;
China;
Department of Stomatology;
the First Affiliated Hospital;
School of Medicine;
Zhejiang University;
Hangzhou 310003;
China;