1. From the Departments of Pathology (Drs Proca and Frankel) and Surgery (Drs Ross and Pratt), The Ohio State University Medical Center and Arthur G. James Cancer Hospital and Research Institute, Columbus, Ohio.
2. Reprints: Wendy L. Frankel, MD, The Ohio State University Medical Center, Department of Pathology, E401 Doan Hall, 410 W 10th Ave, Columbus, OH 43210.