1 Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan.
2 Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan; Dermatology, Department of Integrated Medicine, Graduate School of Medicine, Faculty of Medicine, Osaka University, Osaka, Japan. Electronic address: ishitsuka@derma.med.osaka-u.ac.jp.
3 Department of Dermatology, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan; Dermatology, Department of Integrated Medicine, Graduate School of Medicine, Faculty of Medicine, Osaka University, Osaka, Japan.
4 Department of Dermatology, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA; Gates Center for Regenerative Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.