1 Institute for Immunology, Tsinghua-Peking Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, 100084, China.
2 Joint Graduate Program of Peking-Tsinghua-National Institute of Biological Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China.
3 Beijing Key Laboratory for Immunological Research on Chronic Diseases, Beijing, 100084, China.
4 National Education Examinations Authority, Beijing, 100084, China.
5 Institute for Immunology, Tsinghua-Peking Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, 100084, China. wuli@tsinghua.edu.cn.
6 Beijing Key Laboratory for Immunological Research on Chronic Diseases, Beijing, 100084, China. wuli@tsinghua.edu.cn.