P1122: A PROSPECTIVE, NON-INTERVENTIONAL STUDY OF REAL-WORLD TREATMENT AND OUTCOME IN SECONDARY CNS LYMPHOMA - Stefan Habringer; Uta Demel; Anne-Katrin Fietz; Felicitas Lammer; Roland Schroers; Silvia Hofer; Osnat Bairey; Jan Braess; Anna Sofia Meier-Stiegen; Reingard Stuhlmann; Martin Schmidt-Hieber; Johannes Hoffmann; et al. (HemaSphere, 2023)