OUTCOME OF PATIENTS WITH AGGRESSIVE B‐CELL LYMPHOMA WHO FAILED TO PROCEED TO OR RELAPSED AFTER HIGH DOSE CHEMOTHERAPY AND AUTOLOGOUS HEMATOPOIETIC CELL TRANSPLANTATION. (12th June 2019) - Romejko‐Jarosinska, J.; Paszkiewicz‐Kozik, E.; Popławska, L.; Targonski, L.; Szymanski, M.; Walewski, J.