[1] Univ Washington, Dept Med, Div Nephrol, Seattle, WA 98195 USA
[2] VA Puget Sound Healthcare Syst, Geriatr & Extended Care, Seattle, WA USA
[3] Univ Washington, Dept Med, Div Gerontol & Geriatr Med, Seattle, WA USA
[4] VA Puget Sound Healthcare Syst, Hlth Serv Res & Dev Ctr Innovat, Seattle, WA USA
[5] Univ Washington, Dept Hlth Serv, Seattle, WA 98195 USA