DDR1 and lung cancer: The elevation of DDR1 expression was observed to be significantly correlated to poor prognosis in patients with lung cancer (OS HR = 1.26, p = 0.00042; FP HR = 1.44, p = 6e−04) and gastric cancer (OS HR = 1.41, p = 6.8e−05; PPS HR = 1.52, p = 0.00021) (Figures 3M–P).