RT Journal Article SR Electronic T1 Multidrug- and extensively drug-resistant tuberculosis: an emerging threat JF European Respiratory Review JO EUROPEAN RESPIRATORY REVIEW FD European Respiratory Society SP 195 OP 197 DO 10.1183/09059180.00005209 VO 18 IS 114 A1 M. Berry A1 O. M. Kon YR 2009 UL http://err.ersjournals.com/content/18/114/195.abstract AB