Deng-Wei Chou1,2, Ming-Ho Wu3. 1. Department of Critical Care Medicine, Tainan Municipal Hospital, Tainan, Taiwan, ROC. choudw@gmail.com. 2. Department of Nursing, Chung Hwa University of Medical Technology, Tainan, Taiwan, ROC. choudw@gmail.com. 3. Department of Surgery, Tainan Municipal Hospital, Tainan, Taiwan, ROC.