1. Department of Dermatology, Gil Medical Center, Gachon University College of Medicine, Incheon, Korea.
2. Department of Dermatology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
3. Department of Dermatology, Hallym University College of Medicine, Seoul, Korea.
4. Department of Dermatology, Seoul National University College of Medicine, Seoul, Korea.
5. Department of Dermatology, Hanyang University College of Medicine, Seoul, Korea.
6. Department of Dermatology, Korea University College of Medicine, Seoul, Korea.