P1176: RITUXIMAB IN PRIMARY CNS LYMPHOMA – LONG TERM FOLLOW-UP OF THE PHASE III HOVON 105/ALLG NHL 24 STUDY. (23rd June 2022) - Doorduijn, J.; Issa, S.; van der Holt, B.; Minnema, M.; Seute, T.; Durian, M.; Cull, G.; van der Poel, M.; Stevens, W.; Zijlstra, J.; Nijland, M.; Mason, K.; et al.