<qa>  What is the minimum WBC count for the patient?Unless contraindicated and medically not advisable based on previous chemotherapy, patients will be given conditioning chemotherapy prior to CART22 cell infusion with the intent of lymphodepletion. Additionally, if the patients white blood cell WBC count is 1,000 uL, conditioninglymphodepleting chemotherapy is NOT required. The chemotherapy will be planned so that the last dose is completed 1-4 days BEFORE the planned infusion of CART22 cells. The chemotherapy start date will vary based on the duration of the selected chemotherapy regimen. If the period from chemotherapy to CART22 infusion is delayed 4 or more weeks, the patient will need to be re-treated with lymphodepleting chemotherapy prior to CART22 infusion. 