1. From the Department of Pathology, Henry Ford Hospital, Detroit, Mich (Dr Jones); the Department of Pathology, Phoenixville Hospital, Phoenixville, Pa (Dr Bekeris); the Department of Pathology, Mayo Clinic, Jacksonville, Fla (Dr Nakhleh); the Department of Biostatistics, College of American Pathologists, Northfield, Ill (Dr Walsh); and the Department of Pathology, St Joseph's Hospital, Ann Arbor,