1. Surgery Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
2. Department of Surgery/General Surgery, SUNY Upstate Medical University, Syracuse, NY 13210.
3. Department of Surgery, College of Physicicans and Surgeons, Columbia University, New York, NY 10032.
4. Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN 46202.
5. Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202.
6. Department of Medicine, Indiana University School of Medicine, Indianapolis, IN 46202.