[1] Univ Hlth Network, Div Infect Dis, Toronto, ON, Canada
[2] Univ Toronto, Dept Med, Toronto, ON, Canada
[3] Univ Hlth Network, Mt Sinai Hosp, Div Gen Internal Med, Toronto, ON, Canada
[4] Stanford Univ, Sch Med, Div Infect Dis & Geog Med, Stanford, CA USA
[5] Brigham & Womens Hosp, Div Infect Dis, Boston, MA 02115 USA
[6] Harvard Univ, Sch Med, Boston, MA USA
[7] Beth Israel Deaconess Med Ctr, Div Infect Dis, Boston, MA 02215 USA
[8] Fenway Hlth, Fenway Inst, Boston, MA USA
[9] Massachusetts Gen Hosp, Div Infect Dis, Boston, MA 02114 USA