CCR10 and idiopathic pulmonary fibrosis: Normal and IPF fibroblast cultures were transduced with combinations of 4 guide RNAs (gRNAs) (combinations 1–4; Figure 4A), and deletion of the CCR10-targeted sequence was confirmed by PCR product bands at 294 bp compared with the control (WT and nontargeting control) bands at 1325 bp (Figure 4B).