1 Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College, Fudan University, 138 YiXueYuan Road, Shanghai 200032, P R China.
2 Shanghai public health clinical center, Fudan University, Shanghai 201508, P R China.
3 Shanghai public health clinical center, Fudan University, Shanghai 201508, P R China. Electronic address: zhangxiaonan@shphc.org.cn.
4 Shanghai public health clinical center, Fudan University, Shanghai 201508, P R China. Electronic address: yun.ling@shphc.org.cn.
5 Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College, Fudan University, 138 YiXueYuan Road, Shanghai 200032, P R China; Shanghai public health clinical center, Fudan University, Shanghai 201508, P R China. Electronic address: zgyi@fudan.edu.cn.