[1] VA Puget Sound Healthcare Syst, Div Pulm, Crit Care & Sleep Med, Seattle, WA 98108 USA
[2] Dept Med, Seattle, WA 98195 USA
[3] Univ Washington, Dept Family Med, Seattle, WA USA
[4] Univ Washington, Dept Hlth Syst & Populat Hlth, Sch Publ Hlth, Seattle, WA USA
[5] UW Med, Cambia Palliat Care Ctr Excellence, Seattle, WA 98195 USA
[6] Fred Hutchinson Canc Ctr, Clin Res Div, Seattle, WA USA
[7] Evergreen Healthcare, Div Pulm & Crit Care, Kirkland, WA USA