To confirm DDR1-induced cancer cell invasion and metastasis, we generated stable DDR1-deficient clones using different shRNAs against DDR1 in MDA-PATC 148 (MDA-PATC 148KD#32 and MDA-PATC 148KD#33) and BxPC-3 (BxPC-3KD#32 and BxPC-3KD#33) cells (Supplemental Figure 1A; supplemental material available online with this article; https://doi.org/10.1172/jci.insight.146133DS1). This evidence concerns the gene DDR1 and cancer.