1. Department of Dermatology; Keio University School of Medicine; Tokyo Japan
2. Department of Dermatology; Kurume University School of Medicine; Kurume Japan
3. Department of Dermatology; Juntendo University Faculty of Medicine; Tokyo Japan
4. Department of Epidemiology and Environmental Health; Juntendo University Faculty of Medicine; Tokyo Japan
5. Department of Dermatology; National Center for Child Health and Development; Tokyo Japan
6. Department of Dermatology; Okayama University Graduate School of Medicine; Okayama Japan
7. Kizawa Memorial Hospital; Gifu Japan