CXCL12 and diffuse large B-cell lymphoma: We observed an average of 140-fold higher CXCR4 expression in DLBCL and all investigated DLBCL subgroups in comparison to the GC-Bs (Figure 1a, p < 0.001), whereas no differential expression was found for CXCR7 and CXCL12 (Figure 1a and Figure S1a).