1. Department of Dermatology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
2. Department of Medical Statistics, The Catholic University of Korea College of Medicine, Seoul, Korea.
3. Department of Dermatology, Kyung Hee University School of Medicine, Seoul, Korea.
4. Department of Dermatology, Gachon University Gil Medical Center, Incheon, Korea.
5. Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea.
6. Department of Dermatology, Korea University College of Medicine, Seoul, Korea.
7. Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea.
8. Department of Dermatology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.