J Ohn1,2, K Hur1,2, H Park1,2,3, S Cho1,2,3, J-H Mun1,2. 1. Department of Dermatology, Seoul National University College of Medicine, Seoul, Korea. 2. Institute of Human-Environment Interface Biology, Seoul National University, Seoul, Korea. 3. Department of Dermatology, Seoul Metropolitan Government - Seoul National University Borame Medical Center, Seoul, Korea.