Richter's transformation in patients with chronic lymphocytic leukaemia: a Nationwide Epidemiological Study. - Ben-Dali Y; Hleuhel MH; da Cunha-Bang C; Brieghel C; Poulsen CB; Clasen-Linde E; Bentzen HHN; Frederiksen H; Christiansen I; Nielsen LH; Enggaard L; Helleberg M; et al. (Leukemia & lymphoma, 2020)