1. Department of Emergency Medicine Baylor College of Medicine Houston Texas USA
2. Department of Medicine Baylor College of Medicine Houston Texas USA
3. Center for Innovations in Quality, Effectiveness and Safety, Michael E. DeBakey VA Medical Center Houston Texas USA
4. School of Medicine Baylor College of Medicine Houston Texas USA
5. University of Texas School of Public Health, UT Health Science Center Houston Texas USA
6. Department of Emergency Medicine Massachusetts General Hospital Boston Massachusetts USA
7. Institute on Aging University of Texas Health Science Center Houston Texas USA
8. Department of Emergency Medicine Mayo Medical Center Rochester Minnesota USA
9. Harvard Medical School Boston Massachusetts USA