title: Richter's syndrome: CLL taking a turn for the worse.
authors: St James's University Hospital, Leeds, UK.
authors: Peter
authors: P
authors: Hillmen
mesh_terms: D006801:Humans; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000473:pathology*; D016403:Lymphoma, Large B-Cell, Diffuse / Q000473:pathology*