1. National Laboratory of Macromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
2. Department of Biochemistry and Molecular Biology, State Key Laboratory of Cancer Biology, the Fourth Military Medical University, Xi’an, Shanxi, China
3. National Institutes for Food and Drug Control and WHO Collaborating Center for Standardization and Evaluation of Biologicals, Beijing, China
4. Sinovac Biotech Co., Ltd., Beijing, China
5. Division of Structural Biology, University of Oxford, Oxford, United Kingdom