[1] VA Portland Hlth Care Syst, Ctr Improve Vet Involvement Care, Portland, OR USA
[2] Oregon Hlth & Sci Univ, Dept Family Med, Portland, OR 97201 USA
[3] Edith Nourse Rogers Mem VA Hosp, Ctr Healthcare Org & Implementat Res, Bedford, MA USA
[4] Boston Univ, Sch Med, Pulm Ctr, Boston, MA 02118 USA
[5] Minneapolis VA Healthcare Syst, Ctr Care Delivery & Outcomes Res, Minneapolis, MN USA
[6] Univ Minnesota, Dept Med, Box 736 UMHC, Minneapolis, MN 55455 USA
[7] Univ Florida, Hlth Serv Res Management & Policy, Gainesville, FL USA
[8] Oregon Hlth & Sci Univ, Dept Med, Portland, OR 97201 USA
[9] VA Portland Hlth Care Syst, Sect Pulm & Crit Care Med, Portland, OR USA