1. R. M. Blaese, C. A. Mullen, W. J. Ramsey, National Center for Human Genome Research, National Institutes of Health (NIH), Building 49, Room 2A03, Bethesda, MD 20892, USA, and National Cancer Institute (NCI), NIH, Bethesda, MD 20892, USA.
2. K. W. Culver, M. Clerici, G. Shearer, J. J. Greenblatt, S. A. Rosenberg, NCI, NIH, Bethesda, MD 20892, USA.
3. A. D. Miller, Fred Hutchinson Cancer Research Center, Seattle, WA 98104, USA.
4. C. S. Carter, T. Fleisher, H. Klein, Clinical Center, NIH, Bethesda, MD 20892, USA.
5. L. Chang and W. F. Anderson, National Heart, Lung, and Blood Institute (NHLBI), NIH, Bethesda, MD 20892, USA.
6. Y. Chiang and P. Tolstoshev, Genetic Therapy, Gaithersburg, MD 20878, USA.
7. M. Berger, Department of Pediatrics, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.
8. L. Muul, National Center for Human Genome Research, NIH, Bethesda, MD 20892, USA.
9. R. A. Morgan, National Center for Human Genome Research, NIH, Bethesda, MD 20892, USA, and NHLBI, NIH, Bethesda, MD 20892, USA.