TNFRSF18 and B-cell non-Hodgkin lymphoma: Our results demonstrated that the expression levels of CTLA-4 and GITR were higher in patients with B-cell NHL than those in HVs, suggesting that CTLA-4 and GITR may be involved in modulating suppressive capacity of Treg in human, which might be one of the reasons of higher suppressive ability of Treg from involved lymphatic tissues.