Martien W. Borgdorff*† , Marieke J van der Werf*, Petra E.W. de Haas‡, Kristin Kremer‡, and Dick van Soolingen‡
Author affiliations: *KNCV Tuberculosis Foundation, The Hague, the Netherlands; †University of Amsterdam, the Netherlands; and; ‡National Institute of Public Health and the Environment, Bilthoven, the Netherlands
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