1. Department of Critical Care Medicine, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, People’s Republic of China
2. University of Central South China/Department of Critical Care Medicine, Hunan Cancer Hospital, Changsha, People’s Republic of China
3. Department of Lung Cancer and Gastroenterology, Hunan Cancer Hospital, Changsha, People’s Republic of China
4. Department of Surgery, SUNY Upstate Medical University, Syracuse, New York
5. Department of Surgery, UT Southwestern Medical Center, Dallas, Texas