IPF hLSCs have higher levels of CD105 and lower levels of CD90, AQP5, and SFTPC, but similar levels of CCSP, compared to their nonfibrosis‐derived counterparts; a thorough characterization of LSC composition is provided in Dinh et al.14Some variability in the expression of each marker can be expected even between IPF human cell donors, especially given the heterogeneous nature of IPF and the natural variability involved in performing the biopsies. This evidence concerns the gene AQP5 and idiopathic pulmonary fibrosis.