TGFB1 and Löfgren’s syndrome: In line with the intracellular miRNAs-based prediction [6], the “TGF-β signalling pathway” was predicted here to be affected by the extracellular serum miRNAs (miR-21-5p, miR-340-5p, and miR-212-3p) that differed between our patients with Löfgren's syndrome and those without Löfgren's syndrome.