| Affiliation: | 1. Department of Emergency Medicine, Center for Policy and Research in Emergency Medicine, Oregon Health & Science University, Oregon, Portland, USA;2. Department of Obstetrics and Gynecology, Oregon Health & Science University, Oregon, Portland, USA;3. Division of General Internal Medicine & Geriatrics, Department of Medicine, Oregon Health & Science University, Oregon, Portland, USA;4. Department of Surgery, University of Washington, Seattle, Washington, USA;5. Department of Surgery, Stanford University Medical Center, Palo Alto, California, USA;6. Department of Emergency Medicine, Center for Health Systems Effectiveness, Oregon Health & Science University, Oregon, Portland, USA |
