Comparison of cumulative incidence of CNS relapses in patients with diffuse large B-cell
lymphoma with intermediate or high risk of CNS relapse treated with CNS prophylaxis: either
with 2 doses of intravenous methotrexate 3g/m2 i.v.(arm A) or 6 doses of intrathecal
methotrexate 12mg (arm B) and in patients with low risk of CNS relapse without CNS
prophylaxis (arm C).