title: Concomitant increases in spectrum and level of drug resistance in Mycobacterium tuberculosis isolates.
authors.affiliation: Department of Bacteriology and Immunology, Beijing Tuberculosis & Thoracic Tumour Research Institute, Beijing, China.
authors.forename: Z
authors.initials: Z
authors.lastname: Sun
authors.forename: J
authors.initials: J
authors.lastname: Zhang
authors.forename: H
authors.initials: H
authors.lastname: Song
authors.forename: X
authors.initials: X
authors.lastname: Zhang
authors.forename: Y
authors.initials: Y
authors.lastname: Li
authors.forename: M
authors.initials: M
authors.lastname: Tian
authors.forename: Y
authors.initials: Y
authors.lastname: Liu
authors.forename: Y
authors.initials: Y
authors.lastname: Zhao
authors.forename: C
authors.initials: C
authors.lastname: Li