Three pairs of primers (P1, P2, and P3) for FOXM1-binding sites in RRM2 promoter and a pair of negative control primers (10 kb upstream, non-FOXM1 binding region) were designed to study the FOXM1 binding in SCLC cell lines under different experimental conditions (for details seesupplementary information). Here, FOXM1 is linked to small cell lung carcinoma.