1. Department of Anesthesiology and Pain Medicine Juntendo University Faculty of Medicine Bunkyo‐ku Tokyo Japan
2. Department of Dermatology Kawasaki Medical School General Medical Center Okayama Okayama Japan
3. Department of Dermatology, Faculty of Medicine University of Yamanashi Chuo Yamanashi Japan
4. Department of Dermatology Shizuoka City Shizuoka Hospital Shizuoka Shizuoka Japan
5. Department of Pain Clinic NTT Medical Center Tokyo Shinagawa Tokyo Japan
6. Department of Dermatology Aichi Medical University School of Medicine Nagakute Aichi Japan
7. Department of Pain Management and Palliative Care Medicine Kyoto Prefectural University of Medicine Kyoto Japan
8. Department of Dermatology and Allergology Juntendo University Shizuoka Hospital Izunokuni Shizuoka Japan
9. Department of Dermatology Kimitsu Chuo Hospital Kisarazu Chiba Japan
10. Department of Palliative Care Saga‐Ken Medical Centre Koseikan Saga Japan
11. Department of Dermatology KKR Sapporo Medical Center Sapporo Hokkaido Japan
12. Division of Dermatology Niigata University Graduate School of Medical and Dental Sciences Niigata Japan
13. Department of Dermatology Takamatsu Red Cross Hospital Takamatsu Kagawa Japan
14. Nobelpharma Co., Ltd. Chuo‐ku Tokyo Japan
15. Tokyo Women's Medical University Shinjuku‐ku Tokyo Japan