1 Key Laboratory of Medical Molecular Virology of Ministries of Education & Health, Shanghai Medical College & Institute of Medical Microbiology, Fudan University, Shanghai 200032, China.
2 The Lindsley F Kimball Research Institute, The New York Blood Center, New York, NY 10065, USA.
3 Key Laboratory of Medical Molecular Virology of Ministries of Education & Health, Shanghai Medical College & Institute of Medical Microbiology, Fudan University, Shanghai 200032, China. shibojiang@fudan.edu.cn.