1 School of Medicine, Chung Shan Medical University, Taichung City.
2 Department of Emergency Medicine, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City.
3 Department of Public Health and Institute of Public Health, and Department of Medical Imaging, Chung Shan Medical University Hospital, Taichung City, Taiwan. liawyp@csmu.edu.tw.