1. Department of Dermatology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon, Korea.
2. Department of Dermatology, Kangnam Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, Korea.
3. Department of Dermatology, College of Medicine, Seoul National University, Seoul, Korea.
4. Department of Dermatology, Yonsei University College of Medicine, Seoul, Korea.
5. Department of Dermatology, Myongji Hospital, Kwandong University College of Medicine, Goyang, Korea.