1. Department of Emergency Medicine, Taichung Veterans General Hospital, Taichung 40705, Taiwan
2. Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung 402202, Taiwan
3. Department of Emergency Medicine, Taipei Veterans General Hospital, Taoyuan Branch, Taoyuan 330, Taiwan
4. Department of Emergency Medicine, Taipei Veterans General Hospital, Taipei 11217, Taiwan
5. School of Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
6. Institute of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan
7. Department of Emergency Medicine, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
8. Lung Cancer Diagnosis and Treatment Research Center, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
9. Division of Infectious Disease, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung 40705, Taiwan