1. Department of Dermatology Gunma University Graduate School of Medicine 3‐39‐22 Showa‐machi Maebashi Gunma371‐8511 Japan
2. Department of Diagnostic Pathology Gunma University Graduate School of Medicine 3‐39‐22 Showa‐machi Maebashi Gunma371‐8511 Japan
3. Department of Oncology Clinical Development Gunma University Graduate School of Medicine 3‐39‐22 Showa‐machi Maebashi Gunma371‐8511 Japan
4. Department of Dermatology Graduate School of Medicine University of the Ryukyus 207 Uehara Nishihara Okinawa 903‐0215 Japan