Mycophenolate mofetil Completed Phase 2 Trials for chronic, recurrent Lymphocytic Leukemia / Chronic Lymphocytic Leukemia (CLL) - Refractory / B-Cell Prolymphocytic Leukemia / Recurrent Small Lymphocytic Lymphoma / Leukemia, Prolymphocytic / Chronic Lymphocytic Leukaemia (CLL) / T-Cell Prolymphocytic Leukemia Treatment