[1] Univ Wisconsin, Sch Med & Publ Hlth, Madison, WI 53705 USA
[2] William S Middleton Vet Affairs Hosp, Madison, WI USA
[3] Vet Affairs Med Ctr, Louis Stokes Cleveland Dept, Geriatr Res Educ & Clin Ctr, Div Internal Med, Cleveland, OH USA
[4] Case Western Reserve Univ, Dept Med, Div Infect Dis, Cleveland, OH 44106 USA
[5] Baylor Coll Med, Dept Med, Infect Dis Sect, Houston, TX 77030 USA
[6] Michael E DeBakey VA Med Ctr, Ctr Innovat Qual Effectiveness & Safety, Houston, TX USA
[7] Univ N Carolina, Cecil G Sheps Ctr Hlth Serv Res, Chapel Hill, NC USA
[8] Univ N Carolina, Dept Family Med, Chapel Hill, NC 27514 USA
[9] Univ Michigan, Div Geriatr & Palliat Care Med, Ann Arbor, MI 48109 USA
[10] Vet Affairs Ann Arbor Healthcare Syst, Geriatr Res Educ & Clin Ctr, Ann Arbor, MI USA