1. Department of Nursing, Taoyuan Armed Forces General Hospital, Taoyuan 32549, Taiwan
2. Department of Emergency Medicine, Taoyuan Armed Forces General Hospital, Taoyuan 32549, Taiwan
3. Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei 11490, Taiwan
4. Division of Chest Medicine, Department of Internal Medicine, Cheng Hsin General Hospital, Taipei 11220, Taiwan
5. Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, Taipei 11490, Taiwan