1. Department of Emergency Medicine, Taipei Veterans General Hospital , Taipei 11217, Taiwan
2. Institute of Public Health, School of Medicine, National Yang Ming Chiao Tung University , Taipei 112, Taiwan
3. Department of Health Sciences, University of Central Florida , Orlando, FL 32816, USA
4. Department of Nursing, Taipei Veterans General Hospital , Taipei 11217, Taiwan
5. Institute of Clinical Nursing, School of Nursing, National Yang-Ming University , Taipei 112, Taiwan
6. Center for General Education, National Tsing Hua University , Hsinchu 30013, Taiwan