<qa>  What is the treatment for PS-341 plus EPOCH?Upon entering the study, all participants will receive PS-341. The drug is given as a 3- to 5-second intravenous through a vein injection twice a week for 2 weeks. This is followed by a 1-week rest. Each 3-week period comprises one treatment cycle. The number of cycles a patient receives depends on how well he or she responds to the drug. Patients who do not have a complete remission or whose tumor grows on this therapy will be offered PS-341 in combination with up to six cycles of EPOCH chemotherapy. The treatment for patients taking PS-341 plus EPOCH is as follows: 