Sentence: In the past decade , interferon-γ ( IFN-γ ) release assays have been developed and commercialised to measure the in vitro release of IFN-γ from effector T-cells stimulated with the Mycobacterium tuberculosis-specific antigens ( the 6-kDa early secretory antigenic target and 10-kDa culture filtrate protein ) as an aid to diagnosing TB infection. 
 Section: purpose