1. Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences , Niigata , Japan
2. Department of Dermatology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University , Sapporo , Japan
3. Department of Dermatology, Nara Medical University , Kashihara , Japan
4. Department of Dermatology, Faculty of Medicine, University of Tsukuba , Tsukuba , Japan
5. Department of Dermatology, Yamaguchi University Graduate School of Medicine , Ube , Japan