Demystifying fibrotic hypersensitivity pneumonitis diagnosis: it's all about shades of grey.

Competing Interests: Conflict of interest: S.L.F. Walsh reports personal fees for lecturing from Boehringer Ingelheim, Roche, Intermmune, Sanofi-Genzyme and Bracco, personal fees for advisory board work from Boehringer Ingelheim and The Open Source Imaging Consortium, outside the submitted work. Conflict of interest: L. Richeldi reports personal fees for consultancy from Sanofi-Aventis, ImmuneWorks, Celgene, Nitto, Bristol Myers Squibb and Pliant Therapeutics, grants and personal fees for advisory board work from Roche, personal fees for lecturing from Shionogi, grants and personal fees for steering committee work from Boehringer Ingelheim, personal fees for advisory board work from Fibrogen and Promedior, personal fees for editorial activity from DynaMed, outside the submitted work.