1 Department of Anesthesiology, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan, School of Medicine, Tzu Chi University, Hualien, Taiwan.
2 Department of Emergency Medicine, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan, School of Medicine, Tzu Chi University, Hualien, Taiwan.
3 Department of Physical Medicine and Rehabilitation, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan, School of Medicine, Tzu Chi University, Hualien, Taiwan.
4 Department of Anesthesiology, Buddhist Tzu Chi General Hospital, Hualien, Taiwan, School of Medicine, Tzu Chi University, Hualien, Taiwan.
5 Department of Anesthesiology, National Yang-Ming University Hospital, Yilan City, Yilan County, Taiwan, School of Medicine, Tzu Chi University, Hualien, Taiwan.
6 Department of Anesthesiology, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan, School of Medicine, Tzu Chi University, Hualien, Taiwan, dr_mck@yahoo.com.tw.