In order to assess the level of FTL protein expression in ciliated cells specifically, we next used Qupath to quantify FTL in multiple ciliated airways and patients (Figure 4U), demonstrating a significant decrease in FTL+ ciliated cells in airways from IPF patients compared to healthy individuals; the difference in mean percentage of FTL + FOXJ1+ cells (± SD) was 20.54 ± 2.980% (p value < 0.0001). Here, FTL is linked to idiopathic pulmonary fibrosis.