Center for Cell and Gene Therapy, Baylor College of Medicine, Methodist Hospital and Texas Children's Hospital, and DeBakey Department of Surgery, One Baylor Plaza, Houston, TX 77030; Department of Pediatric Hematology and Oncology, Heinrich-Heine-University Medical Center, D-40225 Dusseldorf, Germany; and Department of Internal Medicine, Heinrich-Heine-University Medical Center, D-40225 Dusseldorf, Germany (At 2004-09-20)
