1. Department of Dermatology Hokkaido University Graduate School of Medicine Sapporo Japan
2. Department of Dermatology Keio University School of Medicine Tokyo Japan
3. Department of Dermatology Kurume University School of Medicine Kurume Japan
4. Department of Dermatology Kawasaki Medical School Kurashiki Japan
5. Department of Dermatology Juntendo University School of Medicine Tokyo Japan
6. Department of Dermatology Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama Japan
7. Department of Epidemiology and Environmental Health Faculty of Medicine Juntendo University Tokyo Japan
8. Department of Dermatology Hirosaki University Graduate School of Medicine Hirosaki Japan
9. Department of Dermatology Osaka City University Graduate School of Medicine Osaka Japan