1 Division of Hospital Medicine, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan; Division of Hospital Medicine, Department of Internal Medicine, Taipei City Hospital, Zhongxing Branch, Taipei, Taiwan.
2 Department of Family Medicine, National Taiwan University Hospital, Taipei, Taiwan.
3 Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan; Department and Graduate Institute of Medical Education and Bioethics, College of Medicine, National Taiwan University, Taipei, Taiwan; Department of Medical Education, National Taiwan University Hospital, Taipei, Taiwan.
4 Department of Orthopedics, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.