CARD16 and idiopathic pulmonary fibrosis: Markers of several pro‐fibrogenic cell types including fibroblast subsets, pericytes, plasma cells, and mesothelial cells were strongly increased in protein measurements of COP, NSIP, HP/EAA, and IPF compared to non‐ILD controls, confirming the power of BALF proteomics to correctly score fibrogenic remodeling in the patients.