[1] Univ Iowa, Carver Coll Med, Dept Internal Med, Iowa City, IA USA
[2] Maine Med Ctr, Dept Med, Portland, ME USA
[3] Albert Einstein Coll Med, Montefiore Hlth Syst, Div Infect Dis, Dept Med, Bronx, NY USA
[4] West Virginia Univ, Sch Med, Dept Med, Morgantown, WV USA
[5] Iowa City Vet Affairs Healthcare Syst, Ctr Access & Delivery Res & Evaluat CADRE, Iowa City, IA USA
[6] Univ Maryland, Sch Med, Dept Epidemiol & Publ Hlth, Baltimore, MD USA
[7] Maine Med Ctr, 22 Bramhall St, Portland, ME 04102 USA