1. Volume 135, Issue 4, Pages 1010-1018 (April 2009)
Comparative Performance of Tuberculin Skin Test, QuantiFERON-TB-Gold In Tube Assay, and T-Spot.TB Test in Contact Investigations for Tuberculosis 
Roland Diel, MD, MPH, Robert Loddenkemper, MD, FCCP, Karen Meywald-Walter, MD, Rene Gottschalk, MD, Albert Nienhaus, MD, MPH 
CHEST 
Volume 135, Issue 4, Pages (April 2009)
DOI: /chest
Copyright © 2009 The American College of Chest Physicians Terms and Conditions

2. Figure 1
Comparison of QFT and T-Spot.TB results for all 812 contacts. The gray circle represents 358 subjects with QFT responses < 0.1 mL and T-Spot results of 0 spots. The gray square represents 52 subjects with QFT responses ≥ 10 IU/mL and T-Spot responses of ≥ 30 spots.
CHEST  , DOI: ( /chest )
Copyright © 2009 The American College of Chest Physicians Terms and Conditions

3. Figure 2 IGRA-positive rates stratified by TST induration.
CHEST  , DOI: ( /chest )
Copyright © 2009 The American College of Chest Physicians Terms and Conditions