Assessment of fludarabine plus cyclophosphamide for patients with chronic lymphocytic leukaemia (the LRF CLL4 Trial): a randomised controlled trial. by Catovsky, D, Richards, S, Matutes, E, Oscier, D, Dyer, M, Bezares, R, Pettitt, A, Hamblin, T, Milligan, D, Child, J, Hamilton, MS, Dearden, C, Smith, A, Bosanquet, A, Davis, Z, Brito-Babapulle, V, Else, M, Wade, R, Hillmen, P