 - Biopsy proven lymphoma for which rituximab, etoposide, prednisone, vincristine sulfate, cyclophosphamide, and doxorubicin hydrochloride R-EPOCH is appropriate frontline therapy, e.g., Burkitt lymphoma or diffuse large B-cell lymphoma DLBCL NHL, including plasmablastic lymphoma and primary effusion lymphoma but not T-cell lymphoma; tissue histology will be reviewed at the treating institution 