Discordant cell-of-origin in refractory/relapsed LBCL at diagnosis and relapse. - Riber Hansen, Elisabeth Victoria; Dennis, Shannon; Brændstrup, Peter; Eriksen, Jens Ole; Everhøj, Anja Elaine; Litman, Thomas; Pedersen, Lars Møller; Pedersen, Mette Ølgod; Gjerdrum, Lise Mette Rahbek (Leukemia & Lymphoma, 2026)