T Hashimoto1, T Nishikawa2,3. 1. Kurume University Institute of Cutaneous Cell Biology, 67 Asahimachi, Kurume, Fukuoka, 830-0011, Japan. hashimot@med.kurume-u.ac.jp. 2. Samoncho Dermatological Clinic, Shinjuku, Tokyo, Japan. 3. Department of Dermatology, Keio University School of Medicine, Tokyo, Japan.