Reporting of interferon-gamma release assay results close to cut-off values

Affiliations

• ¹ International Reference Laboratory of Mycobacteriology, Statens Serum Institut, Copenhagen, Denmark.
• ² National Mycobacterium Reference Service South, Public Health England, London, UK.
• ³ European Center for Disease Prevention and Control, Stockholm, Sweden.
• ⁴ International Reference Laboratory of Mycobacteriology, Statens Serum Institut, Copenhagen, Denmark, Global Health Section, Department of Public Health, University of Copenhagen, Copenhagen, Denmark.
• ⁵ National Mycobacterium Reference Service South, Public Health England, London, UK, Imperial College London, London, UK.