P1229: RITUXIMAB-DOSE-ADJUSTED EPOCH (R-DA-EPOCH) IN PRIMARY MEDIASTINAL LARGE B-CELL LYMPHOMA (PMLBCL): REAL-LIFE EXPERIENCE ON 225 PATIENTS FROM 4 COUNTRIES. (23rd June 2022) - Vassilakopoulos, T.; Ferhanoglu, B.; Horowitz, N. A.; Apostolidis, J.; Mellios, Z.; Kaynar, L.; Zektser, M.; Symeonidis, A.; Piperidou, A.; Kalpadaki, C.; Akay, O. M.; Atalar, S. C.; et al.