1. J. Li, D. Liaw, K. Podsypanina, S. I. Wang, J. Puc, C. Miliaresis, R. Parsons, Department of Pathology and Department of Medicine, College of Physicians & Surgeons, Columbia University, 630 West 168 Street, New York, NY 10032, USA.
2. C. Yen, L. Rodgers, R. McCombie, M. Wigler, Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.
3. S. Bose, B. Tycko, H. Hibshoosh, Department of Pathology, College of Physicians & Surgeons, Columbia University, New York, NY 10032, USA.
4. S. H. Bigner, Department of Pathology, Duke University Medical Center, Durham, NC 27710, USA.
5. B. Giovanella, Stehlin Foundation for Cancer Research, St. Joseph Hospital, Houston, TX 77003, USA.
6. M. Ittmann, New York VA Medical Center and Department of Pathology, New York University, 423 East 23 Street, New York, NY 10010, USA.