ITGA2 and small cell lung carcinoma: In addition, linear regression analysis confirmed the positive correlation between ITGB2 and ITGA2 levels in SCLC cell lines (R2 = 0.82; P = 4 E-03; Figure S1C, top) and the positive correlation between ITGB6 and ITGA2 levels in NSCLC cell lines (R2 = 0.72; P = 9 E-04; Figure S1C, bottom).