1. Department of Dermatology, University of Würzburg, Josef‐Schneider‐Strasse 2, 97080 Würzburg, Germany
2. Department of Dermatology, Keio University School of Medicine, Tokyo, Japan
Department of Dermatology, Groningen University Hospital, Groningen, the Netherlands
3. Department of Dermatology, Hokkaido University School of Medicine, Sapporo, Japan
Department of Dermatology, Kurume University, Fukuoka, Japan