1. Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, PR China;
2. Haikou City People’s Hospital, Haikou City, Hainan, PR China;
3. Changsha Central Hospital, Changsha, Hunan, PR China;
4. Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, PR China;
5. First Teaching Hospital, Xinjiang Medical University, Urumqi, Xinjiang, PR China;
6. AstraZeneca China, Pudong district, Shanghai, PR China;
7. Department of Clinical Sciences, Duke NUS Medical School, Singapore;
8. AstraZeneca Gothenburg, Mölndal, Sweden;
9. AstraZeneca Gaithersburg, Gaithersburg, MD, USA