1 Department of Dermatology, Graduate School of Medicine and Faculty of Medicine, Hokkaido University, Sapporo, Japan; Department of Dermatology, Sapporo City General Hospital, Sapporo, Japan. Electronic address: yfujita@med.hokudai.ac.jp.
2 Department of Dermatology, Graduate School of Medicine and Faculty of Medicine, Hokkaido University, Sapporo, Japan.
3 Department of Dermatology, Graduate School of Medicine and Faculty of Medicine, Hokkaido University, Sapporo, Japan; Department of Dermatology, Gangnam Severance Hospital, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea.
4 Department of Stem Cell Biology and Histology, Tohoku University Graduate School of Medicine, Sendai, Japan.
5 Department of Dermatology, Graduate School of Medicine and Faculty of Medicine, Hokkaido University, Sapporo, Japan; Division of Dermatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.