1. From the Department of Pathology, University of Oklahoma, Health Sciences Center, Oklahoma City (Dr Siami); and the Departments of Dermatology and Pathology, University of Oklahoma, Oklahoma City, and Regional Medical Laboratory, St John Medical Center, Tulsa (Drs Clark and Crowson). Dr Wilkerson is in private practice with the Hillcrest Medical Group/Dermatology, Tulsa, Okla