- Patients who have come off previous cancer therapy for at least 14 days for prior cytotoxic agents, and prior to D0, except when hydroxyurea is given only when needed to control hyperleukocytosis. Persistent clinically significant toxicities from prior chemotherapy must not be greater than Grade 1 (CTCAE 4.03) at the time of enrollment. Salvage/lymphodepleting chemotherapeutic agents may be given up to 3 days prior to T cell reinfusion if necessary to control rapidly growing disease.