Fig. 2From: Prevalence of latent tuberculosis infection among foreign students in Lübeck, Germany tested with QuantiFERON-TB Gold In-Tube and QuantiFERON-TB Gold PlusConcordance between QFT-Plus and QFT-GIT. For QFT-Plus the highest IFN-γ value of antigen tubes TB-1 and TB-2 was taken as the resultBack to article page