1. Department of Medical Laboratory Center, General Hospital of the Central Theater Command, Wuhan, Hubei Province, People’s Republic of China
2. Institute of Immunology, People’s Liberation Army, Third Military Medical University, Chongqing, People’s Republic of China
3. Department of Respiratory and Critical Medicine, General Hospital of the Central Theater Command, Wuhan, Hubei Province, People’s Republic of China
4. Intensive Care Unit, General Hospital of Central Theater Command, Wuhan, Hubei Province, People’s Republic of China
5. Intensive Care Unit, Wuhan Pulmonary Hospital, Wuhan, Hubei Province, People’s Republic of China