FGFR1 and mantle cell lymphoma: Notably, other FGFR homologs (FGFR2-4) were not significantly up-regulated in MCL as compared to B cells (Fig. S3A-C), and FGFR1 was the only FGFR homolog significantly up-regulated in both MCL primary patient samples and cell lines (Fig. S3D-E).