1. State Key Laboratory for Infectious Disease Prevention and Control, National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Beijing, China.
2. Beijing Center for Disease Control and Prevention, Beijing, China.
3. Vanderbilt Institute for Global Health, Vanderbilt University School of Medicine, Nashville, Tennessee.
4. Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom.