1. Department of Respiratory and Critical Care Medicine and Nanfang Hospital, Southern Medical University, Guangzhou, China.
2. Department of General Medicine, Panyu Central Hospital, Guangzhou, China.
3. Department of Intensive Care Unit, Foshan First People's Hospital, Sun Yat-Sen University, Foshan, China.
4. Department of Emergency Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China.
5. State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Department of Infectious Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, China.