Eri Hotta1, Noriaki Nakai1, Norito Katoh1. 1. Department of Dermatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kajii-Cho, Kawaramachi-Hirokoji, Kamigyo-Ku, Kyoto 602-8566, Japan. E-mail: nnakai@koto.kpu-m.ac.jp.