1. Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan
2. Department of Emergency Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan
3. College of Medicine, National Taiwan University, Taipei, Taiwan
4. Department of Medicine, Albert Einstein Medical Center, Philadelphia, PA, USA
5. Department of Epidemiology, Harvard School of Public Health, Boston, MA, USA
6. Department of Pharmacy, E-Da hospital, Kaohsiung, Taiwan