1. S. A. Hahn, M. Schutte, A. T. M. S. Hoque, C. A. Moskaluk, E. Rozenblum, C. L. Weinstein, A. Fischer, R. H. Hruban, Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
2. L. T. da Costa, Graduate Program in Human Genetics and Molecular Biology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
3. C. J. Yeo, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
4. S. E. Kern, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.