Oxaliplatin Recruiting Phase 1 Trials for Refractory Diffuse Large B Cell Lymphoma / Richter's Syndrome / Recurrent Diffuse Large B-Cell Lymphoma / Recurrent Transformed Non-Hodgkin Lymphoma / Transformed Follicular Lymphoma to Diffuse Large B-Cell Lymphoma / Refractory Transformed Non-Hodgkin Lymphoma Treatment