Autologous and Allogeneic Stem-Cell Transplantation for Transformed Chronic Lymphocytic Leukemia (Richter's Syndrome): A Retrospective Analysis From the Chronic Lymphocytic Leukemia Subcommittee of the Chronic Leukemia Working Party and Lymphoma Working Party of the European Group for Blood and Marrow TransplantationKate Cwynarski, Peter Dreger, Liesbeth C. de Wreede et al.|Journal of Clinical Oncology|2012Cited by 132