1. The First Clinical Medical College of Jinan University, Guangzhou, Guangdong Province, China;
2. Department of Respiratory Medicine;
3. Department of Central Laboratory, Youjiang Medical University for Nationalities, Baise, Guangxi, China;
4. Department of Digestive, Youjiang Medical University for Nationalities, Baise, Guangxi, China; Youjiang Medical University for Nationalities, Baise, Guangxi, China;
5. Department of Intensive Care Unit, the People's Hospital of Guangxi, Nanning, Guangxi, China;
6. Department of Surgery and Cancer, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdon; and
7. Department of Intensive Care Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi, China