Noriaki Nakai1, Norito Katoh2. 1. Department of Dermatology, Kyoto Prefectural University of Medicine Graduate School of Medical Science, Kyoto, Japan. Electronic address: nnakai@koto.kpu-m.ac.jp. 2. Department of Dermatology, Kyoto Prefectural University of Medicine Graduate School of Medical Science, Kyoto, Japan.