1. From the University of Sydney, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia (Dr Gupta); the Department of Head and Neck and Oral Pathology, Guy's Hospital, London, United Kingdom (Dr Sandison); the Department of Pathology, Moffitt Cancer Center, Tampa, Florida (Dr Wenig); and the Department of Pathology, Southern California Permanente Medical Group, Woodland Hills Medical