Mycophenolate mofetil Completed Phase 2 Trials for Recurrent Adult Burkitt Lymphoma / Recurrent Mantle Cell Lymphoma / Recurrent Small Lymphocytic Lymphoma / Recurrent Adult Diffuse Large Cell Lymphoma / Recurrent Adult Immunoblastic Large Cell Lymphoma / Recurrent Grade 3 Follicular Lymphoma / Recurrent Adult Grade III Lymphomatoid Granulomatosis / Recurrent Adult Lymphoblastic Lymphoma / Recurrent Grade 1 Follicular Lymphoma / Recurrent Grade 2 Follicular Lymphoma / Splenic Marginal Zone Lymphoma / Recurrent Adult Diffuse Mixed Cell Lymphoma / B-Cell Chronic Lymphocytic Leukemia / Waldenström's Macroglobulinemia (WM) / Recurrent Marginal Zone Lymphoma / Nodal marginal zone B-cell lymphomas / Recurrent Adult Diffuse Small Cleaved Cell Lymphoma Treatment