CD40LG and B-cell chronic lymphocytic leukemia: Again in agreement with these previous studies [8, 37], among the most significant pathways and gene ontology (GO) categories containing differentially expressed genes upon anti-IgM stimulation, both in the UM and M CLL groups, were those related to “Immune Response”, “B-cell receptor signaling pathway” and “Antigen processing and presentation” (Table S3 and Table S4).