Department of Dermatology, Shinshu University School of Medicine, Nagano, Japan;2. Department of Molecular Oncology, John Wayne Cancer Institute at Saint John’s Health Center, Santa Monica, CA, USA;3. Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital, Camperdown, NSW, Australia;4. Department of Dermatology, Shinshu University School of Medicine, Nagano, Japan;5. Department of Surgical Pathology, Saint John’s Health Center, Santa Monica, CA, USA;6. Division of Surgical Oncology, John Wayne Cancer Institute at Saint John’s Health Center, Santa Monica, CA, USA;7. Departments of Surgery, Immunology and Pathology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA