1. Department of Dermatology, Hanyang University Hospital, Hanyang University College of Medicine, Seoul, Korea.
2. Department of Dermatology, Hallym University Hospital, Hallym University College of Medicine, Seoul, Korea.
3. Kim Nack-In Dermatology Clinic, Seoul, Korea.
4. Department of Dermatology, Soonchunhyang University Cheonan Hospital, Soonchunhyang University College of Medicine, Cheonan, Korea.
5. Department of Dermatology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon, Korea.
6. Department of Dermatology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea.
7. Department of Dermatology, National Medical Center, Seoul, Korea.
8. Department of Dermatology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
9. Department of Dermatology, Pusan National University Yangsan Hospital, Pusan University College of Medicine, Yangsan, Korea.
10. Department of Dermatology, Kyung Hee University Medical Center, Kyung Hee University College of Medicine, Seoul, Korea.
11. Department of Dermatology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea.
12. Department of Dermatology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
13. Department of Dermatology, Kyungpook National University School of Medicine, Daegu, Korea.
14. Department of Dermatology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
15. Department of Dermatology, Chonnam National University Hospital, Chonnam University College of Medicine, Gwangju, Korea.
16. Louis Dermatologic Clinic, Guri, Korea.
17. Department of Dermatology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea.
18. Department of Dermatology, Kosin University Gospel Hospital, Kosin University College of Medicine, Busan, Korea.
19. Department of Dermatology, Konyang University Hospital, Konyang University College of Medicine, Daejeon, Korea.
20. Department of Dermatology, Seoul Metropolitan Government - Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea.
21. Department of Dermatology, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.
22. Department of Dermatology, Ehwa Womans University Medical Center, Ewha Womans University College of Medicine, Seoul, Korea.
23. Department of Dermatology, Chosun University Hospital, Chosun University College of Medicine, Gwangju, Korea.