1. Department of Surgical Intensive Care Unit, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, P.R. China
2. Department of Intensive Care Unit, Peking University Shenzhen Hospital, Shenzhen, P.R. China
3. Department of Intensive Care Unit, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, P.R. China
4. Department of Gastrointestinal Surgery, Peking University Shenzhen Hospital, Shenzhen, P.R. China
5. Department of Intensive Care Unit, The First People’s Hospital of Foshan, Foshan, P.R. China
6. Department of Intensive Care Unit, The First People’s Hospital of Guangzhou, Guangzhou, P.R. China
7. Department of Intensive Care Unit, University Cancer Center, Guangzhou, P.R. China