title: Extensively drug resistant tuberculosis: beware patients lost to follow-up.
authors.forename: Ulf R
authors.initials: UR
authors.lastname: Dahle
mesh_terms: D004196:Disease Outbreaks; D006801:Humans; D009664:Norway / Q000453:epidemiology; D018088:Tuberculosis, Multidrug-Resistant / Q000453:epidemiology*