Affiliation: | 1. Department of Pathology, University of Pittsburgh, Pittsburgh, Pennsylvania;2. Department of Pathology, Catholic University-Fondazione Policlinico Universitario, Rome, Italy;3. Department of Pathology, Johns Hopkins Hospital, Baltimore, Maryland;4. Department of Pathology, University of Michigan, Ann Arbor, Michigan;5. Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts |