1 Department of Dermatology, International St. Mary's Hospital, College of Medicine, Catholic Kwandong University, Incheon, Republic of Korea.
2 Department of Dermatology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
3 Department of Dermatology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea. Electronic address: catesal@naver.com.