DDR1 and neoplasm: Herein, we used a variety of databases including Tumor Immunoassay Resource (TIMER), UCSC Xena, Gene Expression Display Server (GEDS), UALCAN, Gene Expression Profiling Interactive Analysis (GEPIA), Kaplan–Meier plotter, and PrognoScan to study DDR1 gene expression and its impact on prognosis in multiple cancers.