TGFB1 and pulmonary fibrosis: To this end, we intratracheally administered Staphylococcus nepalensis strain CNDG, which contains the corisin sequence, or Staphylococcus epidermidis [ATCC14990], as negative control, to germ-free TGFβ1 TG mice separated in three groups with matched lung fibrosis CT scores (Supplementary Fig. 18a, b).