1 Department of Dermatology, Chung-Ang University College of Medicine, Chung Ang University Hospital, 224-1 Heukseok-dong, Dongjak-ku, Seoul, 156-755, South Korea.
2 Department of Dermatology, Chung-Ang University College of Medicine, Chung Ang University Hospital, 224-1 Heukseok-dong, Dongjak-ku, Seoul, 156-755, South Korea. beomjoon@unitel.co.kr.
3 Department of Pathology, Chung-Ang University College of Medicine, Chung Ang University Hospital, 224-1 Heukseok-dong, Dongjak-ku, Seoul, 156-755, South Korea.
4 Department of Plastic and Reconstructive Surgery, Chung-Ang University College of Medicine, Chung Ang University Hospital, 224-1 Heukseok-dong, Dongjak-ku, Seoul, 156-755, South Korea.