[1] Oakwood Healthcare Syst, Dept Med Educ, Div Infect Dis, Dearborn, MI 48124 USA
[2] Duke Univ, Med Ctr, Dept Med, Div Geriatr, Durham, NC 27706 USA
[3] Durham VA Med Ctr, Durham, NC 27705 USA
[4] Wayne State Univ, Sch Med, Dept Internal Med, Div Infect Dis, Detroit, MI 48202 USA
[5] Wayne State Univ, Detroit Med Ctr, Detroit, MI 48201 USA
[6] Wayne State Univ, Univ Hlth Ctr, Detroit, MI 48201 USA