[1] Statens Serum Inst, Int Reference Lab Mycobacteriol, Copenhagen, Denmark
[2] Nordsjaellands Hosp, Dept Pulm & Infect Dis, Copenhagen, Denmark
[3] Univ Copenhagen, Biostat Sect, Copenhagen, Denmark
[4] St Georges Univ London, Inst Infect & Immun, London, England
[5] Statens Serum Inst, Dept Infect Dis Epidemiol & Prevent, Copenhagen, Denmark
[6] Herlev Gentofte Hosp, Dept Internal Med, Copenhagen, Denmark
[7] Univ Hosp Hvidovre, Sect Immigrant Med, Dept Infect Dis, Copenhagen, Denmark