1. Department of Dermatology; Sapporo City General Hospital; North 11 West 13 Chuo-ku Sapporo 060-8604 Japan
2. Department of Plastic Surgery; Sapporo City General Hospital; North 11 West 13 Chuo-ku Sapporo 060-8604 Japan
3. Department of Pathology; Sapporo City General Hospital; North 11 West 13 Chuo-ku Sapporo 060-8604 Japan
4. Sapporo Dermatopathology Institute; North 18 West 3 Kita-ku Sapporo 001-0018 Japan