1 From the Department of Pathology and Immunology, Washington University School of Medicine, St Louis, Missouri (Drs Duncavage and Rosenbaum); the Departments of Medicine, Oncology Division (Dr Advani), and Pathology (Dr Ohgami), Stanford University Medical Center, Stanford, California; the Pathology & Laboratory Medicine Service, James A. Haley Veterans Affairs Medical Center, Tampa, Florida (Drs Agosti, Foulis, and Kang); the Moffitt Cancer Center, Tampa, Florida (Ms Gibson); the Department of Hematopathology, Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston (Drs Khoury, Medeiros, and Patel); the Department of Pathology, Clarient Pathology Services, Aliso Viejo, California (Dr O'Malley); and the Department of Hematopathology, University of New Mexico Health Sciences Center, Albuquerque (Dr Wilson).