1. Experimental Immunology Branch, National Cancer Institute, NIH, Bethesda, MD 20892, USA.
2. School of Medicine, University of Utah, Salt Lake City, UT 84132, USA.
3. Center for Biomedical Informatics and Information Technology, National Cancer Institute, NIH, Rockville, MD 20850, USA.
4. Laboratory of Muscle Stem Cells and Gene Regulation, National Institute of Arthritis and Musculoskeletal and Skin Diseases, NIH, Bethesda, MD 20892, USA.
5. Laboratory of Pathology, National Cancer Institute, NIH, Bethesda, MD 20892, USA.
6. Department of Molecular Biology, Yokohama City University Graduate School of Medical Science, Fukuura 3-9, Kanazawa-ku, Yokohama, Kanagawa 216-0004, Japan.