1 Department of Dermatologic Oncology, National Cancer Center Hospital, Tokyo, Japan, Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
2 Department of Dermatologic Oncology, National Cancer Center Hospital, Tokyo, Japan.
3 Department of Diagnostic Pathology, National Cancer Center Hospital, Tokyo, Japan.
4 Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan.