Masayuki Sakiyama1,2, Yo Kawakubo3. 1. Department of Dermatology, National Defense Medical College, Tokorozawa, Japan. sakiyama@ndmc.ac.jp. 2. Department of Dermatology, Self Defense Forces Central Hospital, Tokyo, Japan. sakiyama@ndmc.ac.jp. 3. Department of Dermatology, Self Defense Forces Central Hospital, Tokyo, Japan.