[1] King Drew Med Ctr, Dept Internal Med MP 11, Los Angeles, CA 90059 USA
[2] St Louis Univ, Sch Med, St Louis Vet Affairs Med Ctr, Div Geriatr Med, St Louis, MO 63104 USA
[3] Univ Michigan, Sch Med, Ctr Geriatr Res Educ & Clin, Ann Arbor Vet Affairs Med Ctr, Ann Arbor, MI USA
[4] Harvard Univ, Sch Med, Boston, MA USA
[5] Wake Forest Univ, Sch Med, Div Infect Dis, Dept Internal Med, Winston Salem, NC 27109 USA
[6] Washington Hosp Ctr, Washington, DC 20010 USA
[7] Charles R Drew Univ Med & Sci, Dept Internal Med, Los Angeles, CA 90059 USA
[8] Commonwealth Fund, New York, NY USA