1. Medical Scientist Training Program, Baylor College of Medicine, Houston, TX 77030.
2. Interdepartmental Program in Cell and Molecular Biology, Baylor College of Medicine, Houston, TX 77030.
3. Department of Medicine, Baylor College of Medicine, Houston, TX 77030.
4. Center for Cell and Gene Therapy, Baylor College of Medicine, Houston, TX 77030.
5. Wellcome Trust Sanger Institute, Hinxton, Cambridge, UK.
6. Howard Hughes Medical Institute, Department of Molecular Biology and Genetics, Johns Hopkins School of Medicine, Baltimore, MD.
7. Michael E. DeBakey VA Medical Center, Houston, TX 77030.