1. Department of Dermatology; Okayama University Graduate School of Medicine; Dentistry and Pharmaceutical Sciences; Okayama Japan
2. Department of Dermatology; Kawasaki Medical School; Kurashiki Japan
3. Department of Dermatology; Kawasaki Hospital; 2-1-80 Nakasange Kitaku Okayama City Okayama 700-8505 Japan
4. Department of Epidemiology and Environmental Health; Juntendo University Graduate School of Medicine; Tokyo Japan
5. Department of Dermatology; Hamamatsu University School of Medicine; Hamamatsu Japan
6. Department of Dermatology; Kyorin University School of Medicine; Tokyo Japan