Institution: | 1. Department of Respiratory Medicine, General Hospital of Guangzhou Military Command of PLA, Guangzhou, Guangdong, China;2. Department of Respiratory Medicine, Hospital No 458 of PLA, Guangzhou, Guangdong, China;3. MICU, Key Laboratory of Geriatric Infection and Organ Function Support of Guangdong Provincial, General Hospital of Guangzhou Military Command of PLA, Guangzhou, Guangdong, China;University of North Dakota, UNITED STATES |