Balmelli, Carlo, Frédéric Zysset, Alberto Pagnamenta, Patrick Francioli, Catherine Lazor-Blanchet, Giorgio Zanetti, and Jean-Pierre Zellweger. 2014. “Contact Tracing Investigation After Professional Exposure to Tuberculosis in a Swiss Hospital Using Both Tuberculin Skin Test and IGRA”. Swiss Medical Weekly 144 (3334):w13988. https://doi.org/10.4414/smw.2014.13988.