1 From the Department of Pathology, University of Utah, Salt Lake City (Dr Kelley); the Departments of Pathology (Drs Arber and Zehnder) and Medicine (Dr Medeiros), Stanford University School of Medicine, Stanford, California; the Blood and Marrow Transplantation Program, Moffitt Cancer Center, Tampa, Florida (Ms Gibson); the Department of Pathology, Ohio State University, Columbus (Dr Jones); the Department of Hematopathology, Division of Pathology and Laboratory Medicine, The University of Texas MD Anderson Cancer Center, Houston (Drs Khoury and Patel); the Department of Pathology, Clarient Pathology Services, Aliso Viejo, California (Dr O'Malley); the Department of Pathology and Laboratory Medicine, Tufts Medical Center, Boston, Massachusetts (Dr Pilichowska); the Department of Pathology, University of New Mexico Health Sciences Center, Albuquerque (Dr Vasef); and the Department of Pathology, Intermountain Healthcare, Salt Lake City, Utah (Dr Wallentine).