1. Department of Dermatology Nippon Medical School Chiba Hokusoh Hospital Inzai Chiba Japan
2. Department of Dermatology Nippon Medical School Bunkyo‐Ku Tokyo Japan
3. Department of Dermatology Tokyo Medical University Shinjuku‐Ku Tokyo Japan
4. Department of Dermatology Tokyo Teishin Hospital Chiyoda‐Ku Tokyo Japan