1. Department of Medical Intensive Care Unit, Zhangzhou Affiliated Hospital of Fujian Medical University, Zhangzhou, Fujian, P. R China
2. Department of Neurosurgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, P. R China
3. Department of Intensive Care Unit, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, P. R China