1. Z. G. Wang, L. Delva, M. Gaboli, R. Rivi, M. Giorgio, P. P. Pandolfi, Department of Human Genetics and Molecular Biology Program, Memorial Sloan-Kettering Cancer Center, Sloan-Kettering Division, Graduate School of Medical Sciences, Cornell University, 1275 York Avenue, New York, NY 10021, USA.
2. C. Cordon-Cardo, Department of Pathology, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10021, USA.
3. F. Grosveld, Department of Cell Biology and Genetics, Faculty of Medicine, Erasmus University, Post Office Box 1738, 3000 DR, Rotterdam, Netherlands.