1. State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Viral Hepatitis Research, Department of Infectious Diseases, Nanfang Hospital, the Southern Medical University, Guangzhou, China.
2. Department of Emergency Medicine, Nanfang Hospital, the Southern Medical University, Guangzhou, China.
3. Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, the Southern Medical University, Guangzhou, China.
4. Department of Emergency Medicine, the Military General Hospital of Beijing PLA, Beijing, China.
5. Department of Respiratory Diseases, Nanfang Hospital, the Southern Medical University, Guangzhou, China.