1. Department of Biological Sciences, and Carnegie Mellon University, Pittsburgh, Pennsylvania, USA.
2. Computational Biology Department, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA.
3. Genetics Branch, Cancer Genomics Section, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA.
4. Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, Maryland, USA.