1. From the Departments of Pathology (Drs Netto, Watkins, and Tillery) and Surgery (Drs Jennings and Klintmalm), Baylor University Medical Center, Dallas, Tex; and the Departments of Pathology, Mayo Clinic, Scottsdale, Ariz (Drs Williams, Colby, and dePetris); University of Texas Health Science Center, San Antonio (Dr Sharkey); Oregon Health Sciences University, Portland (Dr Corless); Medical Univer