1 Department of Dermatology, Kansai Medical University, Osaka, Japan; Allergy Center, Kansai Medical University, Osaka, Japan.
2 Department of Dermatology, Kansai Medical University, Osaka, Japan; Department of Dermatology and Venereology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh, Viet Nam.
3 Department of Dermatology, Kansai Medical University, Osaka, Japan; Allergy Center, Kansai Medical University, Osaka, Japan. Electronic address: nkambe@hirakata.kmu.ac.jp.
4 Department of Dermatology, Kansai Medical University, Osaka, Japan.