1. Division of Cardiology, University of Ottawa Heart Institute, Ottawa K1Y4W7, Canada.
2. Donald W. Reynolds Cardiovascular Clinical Research Center and the Eugene McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
3. Perlegen Sciences, Mountain View, CA 94043, USA.
4. Genomics Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
5. U.S. Department of Energy Joint Genome Institute, Walnut Creek, CA 94598, USA.