1. 1Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD;
2. 2Department of Biology, Johns Hopkins University, Baltimore, MD;
3. 3Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD;
4. 4Laboratory for Tissue Dynamics, RIKEN Center for Integrative Medical Sciences, Yokohama, Kanagawa, Japan;
5. 5Graduate School of Medical Life Science, Yokohama City University, Yokohama, Kanagawa, Japan;
6. 6Department of Hematology and Stem Cell Transplantation, University Hospital Essen, Essen, Germany;
7. 7Institute for Molecular Immunology, Center for Molecular Medicine Cologne (CMMC), CECAD Research Center, Faculty of Medicine University Hospital Cologne, University of Cologne, Cologne, Germany; and
8. 8Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD