1. Department of Dermatology, College of Medicine Dankook University 201, Manghyang‐ro. Dongnam‐gu Cheonan‐si Chungcheongnam‐do 31116 Republic of Korea
2. Department of Dermatology Yonsei University Wonju College of Medicine Wonju‐si Gangwon‐do 26426 Republic of Korea