Affiliation: | 1. Department of Pediatrics, Sidney Faber Cancer Insitute and Children''s Hospital Medical Center, Harvard Medical School, Boston, MA 02115, USA;2. Laboratory of Tumor Biology, Group W, Sidney Farber Cancer Institute and Department of Microbiology and Molecular Genetics, Harvard Medical School, Boston, MA 02115, USA;3. Center for Blood Research and the Department of Nutrition, Harvard University School of Public Health, Boston, MA 02115, U.S.A. |