I have a young patient with hepatosplenic T-cell lymphoma. He had 4 cycles of CHOEP, he progressed; then he had 4 cycles of SMILE with PEG-Asparaginase, and he progressed. He received 1 cycle of CODOX-M and 1 cycle of IVAC. Unfortunately he has progressed again. His performance status is excellent, he does not have comorbidities and he has a fully matched sibling. What chemotherapy regimen do you suggest before taking him to a myeloablative allogeneic hematopoietic stem cell transplantation?