1. United States Military Cancer Institute and Department of Pathology (M.T.N., J.X., H.R.), Uniformed Services University of the Health Sciences, Bethesda, Maryland 20852
2. Institute of Pathology (L.B.), University of Basel, Basel CH-43003, Switzerland
3. Eppley Institute for Research in Cancer and Allied Diseases (K.-U.W.), Nebraska Medical Center, Omaha, Nebraska 68182