KRT17 and idiopathic pulmonary fibrosis: Further quantification of frequencies of KRT17+ cells of all cells within 20 μm from collagen VII–positive pixels (schematic picture of cells within 20 μm in Figure 5H) showed that the percentage of KRT17+ cells was increased in IPF lungs (median, 39.4%; Figure 5I) compared with that in control lungs (median, 11.5%; Figure 5I), indicating more abundant KRT17+ cells in close proximity to collagen VII.