FIGURE 1 The expression level of DDR1 in gastric cancer. (A) DDR1 expression levels in multiple tumors and normal tissues were analyzed using the TIMER database (*p < 0.05, **p < 0.01, ***p < 0.001). (B) The mRNA level of DDR1 was examined in STAD using UCSC Xena database. Welch ’ s t-test was used for statistical difference. (C) A scatter plot of DDR1 expressions in 37 gastric cancer cell lines using the GEDS