[1] Christian Med Coll & Hosp, Dept Pulm Med, Vellore, Tamil Nadu, India
[2] Christian Med Coll & Hosp, Dept Microbiol, Vellore, Tamil Nadu, India
[3] McGill Univ, McGill Int TB Ctr, Montreal, PQ H2X 2P4, Canada
[4] McGill Univ, Dept Epidemiol Biostat & Occupat Hlth, Montreal, PQ H2X 2P4, Canada
[5] Stanford Univ, Dept Pathol, Stanford, CA 94305 USA
[6] Boston Childrens Hosp, Dept Lab Med, Boston, MA USA
[7] Beth Israel Deaconess Med Ctr, Div Infect Dis, Boston, MA 02215 USA