1. Department of Emergency Medicine, Taoyuan Armed Forces General Hospital, Taoyuan 32549, Taiwan
2. Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei 11490, Taiwan
3. Department of Pulmonary Medicine, Cheng-Hsin General Hospital, Taipei 11220, Taiwan
4. School of Public Health, National Defense Medical Center, Taipei 11490, Taiwan
5. Department of Medical Research, Tri-Service General Hospital, National Defense Medical Center, Taipei 11490, Taiwan
6. Upper School, Taipei American School, Taipei 111039, Taiwan
7. Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, Taipei 11490, Taiwan