1. Department of Dermatology National Defense Medical College Tokorozawa Japan
2. Department of Dermatology Graduate School of Medical and Dental Sciences Tokyo Medical and Dental University Tokyo Japan
3. Department of Dermatology School of Medical Sciences Nagasaki University Nagasaki Japan
4. Department of Dermatology Hamamatsu University School of Medicine Hamamatsu Japan
5. Department of Dermatology Kyoto University Graduate School of Medicine Kyoto Japan
6. Juntendo Itch Research Center Institute for Environmental and Gender‐specific Medicine Juntendo University Graduate School of Medicine Tokyo Japan
7. Department of Dermatology Kyorin University School of Medicine Tokyo Japan
8. Department of Dermatology Faculty of Medicine Shimane University Izumo Japan
9. Department of Dermatology Tohoku University School of Medicine Sendai Japan
10. Department of Dermatology Kawasaki Medical School Kurashiki Japan
11. Department of Dermatology Course of Integrated Medicine Graduate School of Medicine Osaka University Suita Japan