1. Department of Clinical Laboratory, Hainan General Hospital, Haikou, People's Republic of China.
2. National Institute for Communicable Disease Control and Prevention, Beijing, People's Republic of China.
3. State Key Laboratory for Infectious Disease Prevention and Control, Beijing, People's Republic of China.
4. Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, People's Republic of China.
5. Hainan Department, The General Hospital of the Chinese People's Liberation Army, Sanya, People's Republic of China.