1. Division of Pulmonary and Critical Care Medicine; Center for Healthcare Outcomes & Policy; University of Michigan; Ann Arbor; MI
2. Department of Epidemiology; University of Washington; Seattle; WA
3. Department of Emergency Medicine; University of Pittsburgh; Pittsburgh; PA
4. Saint Luke's Mid America Heart Institute; University of Missouri-Kansas City; Kansas City; MO
5. Department of General Internal Medicine; King County MedicOne; University of Washington; Seattle; WA