Autologous hematopoietic stem cell transplantation in chronic lymphocytic leukemia: results of European intergroup randomized trial comparing autografting versus observation. by Michallet, M, Dreger, P, Sutton, L, Brand, R, Richards, S, van Os, M, Sobh, M, Choquet, S, Corront, B, Dearden, C, Gratwohl, A, Herr, W, Catovsky, D, Hallek, M, de Witte, T, Niederwieser, D, Leporrier, M, Milligan, D