Affiliation: | 1. Department of Pathology, Boston Children''s Hospital and Harvard Medical School, Boston, Massachusetts;2. Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands;3. Department of Pathology, University of Leuven, Leuven, Belgium;4. Sarcoma Research Center, MD Anderson Cancer Center, The University of Texas, Houston, Texas;5. Department of Pathology, MD Anderson Cancer Center, The University of Texas, Houston, Texas;6. Department of Pathology, Brigham and Women''s Hospital, Boston, Massachusetts |