1. Department of Dermatology Nagata Clinic Niigata Japan
2. Japanese Contact Dermatitis Research Group Nagoya Japan
3. Department of Allergology Fujita Health University School of Medicine Nagoya Japan
4. Department of Integrative Medical Science for Allergic Disease Fujita Health University School of Medicine Nagoya Japan
5. Department of Dermatology Toho University Omori Medical Center Tokyo Japan
6. Department of Dermatology Graduate School of Medical Science Kyoto Prefectural University of Medicine Kyoto Japan
7. Department of Dermatology Hyogo Prefectural Kakogawa Medical Center Kakogawa Japan
8. Department of Environmental Dermatology & Allergology Daiichi Clinic Nagoya Japan
9. Department of Dermatology Nishi‐Sapporo Skin and Allergy Clinic Sapporo Japan
10. Department of Dermatology Gokeikai Osaka Kaisei Hospital Osaka Japan
11. Department of Dermatology Showa University Fujigaoka Hospital Yokohama Japan
12. Department of Dermatology Joy Dermatological Clinic Sanyo‐Onoda Japan
13. Department of Dermatology Fukuoka Sanno Hospital Fukuoka Japan
14. Department of Dermatology Saiseikai Yokohamashi Nanbu Hospital Yokohama Japan
15. Department of Dermatology Watanabe Skin and Plastic Surgery Clinic Matsuyama Japan
16. Department of Dermatology Nara Medical University School of Medicine Kashihara Japan