1. Department of Nursing, Taipei Veterans General Hospital, Taipei, Taiwan
2. School of Nursing, College of Medicine, National Taiwan University, Taipei, Taiwan
3. Department of Emergency Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
4. Department of Political Science, Department of Statistics, Iowa State University, Ames, IA, USA
5. Department of Health Sciences, College of Health Professions and Sciences, University of Central Florida, Orlando, FL, USA