1 Department of Dermatology, Arumdaun Nara Dermatologic Clinic, Seoul, Korea Department of Dermatology, Ewha Womans University College of Medicine, Seoul, Korea Department of Dermatology, Arumdaun Nara Dermatologic Clinic, Seoul, Korea Department of Pathology, Chung-Ang University College of Medicine, Seoul, Korea Department of Dermatology, Ewha Womans University College of Medicine, Seoul, Korea.