1. Department of Intensive Care Unit, The Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu 212001, P.R. China
2. Emergency Department, Zhenjiang Emergency Center, Zhenjiang, Jiangsu 212001, P.R. China
3. Department of Emergency, The Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu 212001, P.R. China
4. Department of Respiratory and Critical Care Medicine, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, Jiangsu 210002, P.R. China