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2. L. D. Stein, Whitehead-MIT Center for Genome Research, Whitehead Institute for Biomedical Research, 9 Cambridge Center, Cambridge, MA 02142, USA, and Department of Pathology, Brigham and Women's Hospital, Boston, MA 02115, USA.
3. C. Fizames, S. Fauré, G. Gyapay, C. Dib, J. Weissenbach, Généthon, CNRS URA 1922, 1 rue de l'Internationale, 91000 Evry, France.
4. J. Morissette, Généthon, CNRS URA 1922, 1 rue de l'Internationale, 91000 Evry, France, and Centre de Recherche du Centre Hospitalier de l'Université Laval, 2705 Boulevard Laurier, Ste-Foy, Québec G1V 4G2, Canada.
5. J. B. Orlin, Sloan School of Management, MIT, Cambridge, MA 02139, USA.
6. D. C. Page, Whitehead-MIT Center for Genome Research, Whitehead Institute for Biomedical Research, 9 Cambridge Center, Cambridge, MA 02142, USA; Howard Hughes Medical Institute, MIT, 9 Cambridge Center, Cambridge, MA 02139, USA; and Department of Biology, MIT, 9 Cambridge Center, Cambridge, MA 02139, USA.
7. E. S. Lander, Whitehead-MIT Center for Genome Research, Whitehead Institute for Biomedical Research, 9 Cambridge Center, Cambridge, MA 02142, USA, and Department of Biology, MIT, 9 Cambridge Center, Cambridge, MA 02139, USA.