1. Department of Skin Oncology/Dermatology Saitama Medical University International Medical Center Saitama Japan
2. Department of Dermato‐Oncology/Dermatology National Hospital Organization Kagoshima Medical Center Kagoshima Japan
3. Department of Dermatolgy Faculty of Medicine University of Tsukuba Ibaraki Japan
4. Community Health Science Center Saitama Medical University Saitama Japan
5. Department of Dermatology University of Heidelberg Heidelberg Germany