BCL2 and diffuse large B-cell lymphoma: Besides, patients with MYC/BCL2 type DHL, MYC/BCL6 type DHL and MYC/BCL2 type atypical DHL all had shorter OS than patients with conventional DLBCL (P = 0.007, P < 0.001, and P < 0.001, respectively, Additional file 1: Figure S1).