“…The variables of interest were the use of rituximab with chemotherapy, the type of chemotherapy defined as either (1) (2) cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP), (3) modified or low-dose CHOP, (4) infusional etoposide, prednisone, infusional vincristine, infusional doxorubicin, and cyclophosphamide (EPOCH), (5) vincristine and steroid (VS), (6) doxorubicin, cyclophosphamide, vindesine, bleomycin, and prednisolone (ABCVP) or LNHIV91 (for detailed description, see the original publication 24 ), (7) infusional cyclophosphamide, doxorubicin, and etoposide (CDE), and (8) the oral regimen lomustine, etoposide, cyclophosphamide and procarbazine (Remick regimen), 25 concurrent use of cART, and supportive use of granulocyte-colony-stimulating factor (G-CSF). Additionally, we grouped the chemotherapeutic regimens based on their relative intensity compared with CHOP for parts of the analysis as follows: less dose-intense regimens (VS, Remick regimen, modified, and/or low-dose CHOP) and doseintense regimens (ACVBP and intensive regimens).…”