1. Division of Surgical Pathology; Tokyo Medical and Dental University Hospital; Tokyo Japan
2. Department of Diagnostic Pathology; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
3. Department of Oral Pathology; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
4. Department of Dermatology; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
5. Department of Human Pathology; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan