[1] Univ Washington, Harborview Med Ctr, Dept Med, Div Pulm & Crit Care Med, Seattle, WA 98104 USA
[2] Univ Washington, Sch Publ Hlth, Dept Epidemiol, Seattle, WA 98195 USA
[3] Seattle Epidemiol Res & Informat Ctr, Off Res & Dev, Seattle, WA USA
[4] Grp Hlth Res Inst, Grp Hlth, Seattle, WA USA
[5] Univ Washington, Harborview Med Ctr, Dept Spiritual Care, Seattle, WA 98104 USA