1 Department of Emergency Medicine, Taichung Veterans General Hospital, 1650 Taiwan Boulevard Sect. 4, Taichung 40705, Taiwan; School of Medicine, Chung Shan Medical University, Taichung, Taiwan; Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan; Department of Nursing, College of Health, National University of Taichung Science and Technology, Taichung, Taiwan. Electronic address: song9168@pie.com.tw.
2 School of Medicine, Chung Shan Medical University, Taichung, Taiwan; Department of Critical Care Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.
3 Division of Infection, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.
4 Department of Emergency Medicine, Taipei Veterans General Hospital, Taoyuan Branch, No. 100, Sec. 3, Cheng-Kung Road, Taoyuan 330, Taiwan; Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Taipei, Taiwan. Electronic address: simpleabei@yahoo.com.tw.