1. The Third People's Hospital of Chengdu; Department of Intensive Care Medicine; 82 Qinglong street Chengdu China 610031
2. Affiliated Hospital of Chengdu University; Emergency Department; Chengdu Sichuan China 610081
3. West China Hospital, Sichuan University; Cochrane China; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
4. Musgrove Park Hospital; Department of Anaesthesia/ITU; Taunton UK TA1 5DA