1. Department of Emergency Medicine Northwestern University Feinberg School of Medicine Chicago Illinois USA
2. Center for Health Services & Outcomes Research Northwestern University Feinberg School of Medicine Chicago Illinois USA
3. Department of Emergency Medicine Florida Atlantic University Schmidt College of Medicine Boca Raton Florida USA
4. Department of Emergency Medicine Delray Medical Center Delray Beach Florida USA
5. Department of Medicine Florida Atlantic University Schmidt College of Medicine Boca Raton Florida USA
6. Division of Gerontology, Geriatrics, and Palliative Care, Department of Medicine University of Alabama at Birmingham (UAB) Birmingham Alabama USA