Study design. Patients' cells were collected and stored on a separate protocol. Day 0 indicates the day of cell infusion. Cells were thawed on day −5, and transduction was begun on day −4. The busulfan was infused on days −3 and −2. Patients 2 and 3 received palifermin given on days −6 to −4 and −1 to 1. Patient 3 also started rapamycin on day −1 and continued it for 30 days after transplantation.