Consistent with these results, we found a positive correlation between the expression of ITGB2 and ITGA2 in SCLC (R2 = 0.84, P < 0.05, Figure S1B, top) and a positive correlation between the expression of ITGB6 and ITGA2 in LUAD (R2 = 0.94, P < 1 E-04, Figure S1B, bottom) by linear regression analysis. Here, ITGA2 is linked to small cell lung carcinoma.