1. Department of Dermatology, Faculty of Medicine and Graduate School of Medicine Hokkaido University Sapporo Japan
2. Department of Dermatology Kushiro City General Hospital Kushiro Japan
3. Department of Dermatology Hakodate Central General Hospital Hakodate Japan
4. Department of Hematology Kushiro Rosai Hospital Kushiro Japan
5. Department of Hematology Sapporo Hokuyu Hospital Sapporo Japan