Noriaki Nakai1, Akifumi Ohshita1, Norito Katoh1. 1. Department of Dermatology, Kyoto Prefectural University of Medicine, Graduate School of Medical Science, 465 Kajii-cho, Kawaramachi Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan. E-mail: nnakai@koto.kpu-m.ac.jp.