1. University of Washington, Division of Pulmonary, Critical Care, and Sleep Medicine, Seattle, Washington, United States
2. Veterans Affairs Puget Sound Healthcare System, Health Services Research & Development, Seattle, Washington, United States;
3. Veterans Affairs Puget Sound Healthcare System, Health Services Research & Development, Seattle, Washington, United States
4. VA Eastern Colorado Health Care System, 19982, Health Services Research & Development, Aurora, Colorado, United States
5. University of Washington, Pulmonary and Critical Care Medicine, Seattle, Washington, United States
6. Veterans Administration Puget Sound Healthcare System, Seattle, Washington, United States
7. University of Washington, Division of Pulmonary and Critical Care Medicine, Seattle, Washington, United States
8. VA Office of Veterans Access to Care, Washington, D.C., United States
9. University of Washington, Division of Pulmonary and Critical Care Medicine, Seatlle, Washington, United States