1. Department of Dermatologic Oncology; National Cancer Center Hospital; 5-1-1 Tsukiji, Chuo-ku Tokyo 104-0045 Japan
2. Department of Plastic and Reconstructive Surgery; Graduate School of Medicine; University of Hokkaido at Sapporo, Kita-15 Nishi-7, Kita-Ku, Sapporo Hokkaido, 060-8638 Japan