1. Emergency Intensive Care Unit, Wenling Hospital Affiliated to Wenzhou Medical University, The First People's Hospital of Wenling, Wenling, Zhejiang 317500, P.R. China
2. Department of Emergency Care, Changsha Central Hospital, Changsha, Hunan 410004, P.R. China
3. Intensive Care Unit, First Affiliated Hospital of Wenzhou Medical University, Wenling, Zhejiang 325000, P.R. China