1. National Institutes for Food and Drug Control, Beijing, China
2. Hualan Biological Engineering Inc., Henan, China
3. Shandong Xinbo Pharmaceutical Co. Ltd., Dezhou, China
4. Beijing Minhai biotechnology Co. Ltd., Beijing, China
5. State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Institute of Diagnostics and Vaccine Development in Infectious Diseases, School of Public Health, Xiamen University, Xiamen, China