1 Department of Critical Care Medicine, West China Hospital, West China Medical School, Sichuan University, Chengdu, PR China.
2 Northern Clinical School Intensive Care Research Unit, Sydney Medical School, University of Sydney, Sydney, NSW, Australia. Gordon.Doig@EvidenceBased.net.
3 Healthcare-Associated Infection Control Center, Sichuan Academy of Medical Sciences, School of Medicine, Sichuan People's Hospital, University of Electronic Science and Technology of China, Chengdu, PR China.
4 Department of Critical Care Medicine, Sichuan Academy of Medical Sciences, School of Medicine, Sichuan People's Hospital, University of Electronic Science and Technology of China, Chengdu, PR China.
5 Department of Respiratory and Critical Care Medicine, West China Medical School, West China Hospital, Sichuan University, Chengdu, PR China.