1. Mouse Cancer Genetics Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD, USA.
2. Bioinformatics and Systems Biology Core, National Heart Lung Blood Institute, National Institutes of Health, Rockville Pike, Bethesda, MD, USA.
3. Leidos Biomedical Research, Inc., Basic Science Program, Frederick National Laboratory, Frederick, MD, USA.
4. Department of Medicine, University of California, San Diego, La Jolla, CA, USA.
5. Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA, USA.