1. Guangzhou Women and Children's Medical Center Guangzhou Medical University Guangzhou 510623 P. R. China
2. State Key Laboratory of Virology Wuhan Institute of Virology Center for Biosafety Mega‐Science Chinese Academy of Sciences (CAS) Wuhan 430071 P. R. China
3. College of Life Science University of Chinese Academy of Sciences Beijing 100049 P. R. China
4. National Laboratory of Biomacromolecules CAS Center for Excellence in Biomacromolecules Institute of Biophysics Chinese Academy of Sciences (CAS) Beijing 100101 P. R. China