1. Department of Dermatology, Inha University School of Medicine, Incheon, Korea.
2. Department of Dermatology and Institute of Hair and Cosmetic Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
3. Department of Dermatology, The Catholic University of Korea School of Medicine, Seoul, Korea.
4. Department of Dermatology, Korea University School of Medicine, Seoul, Korea.
5. Department of Dermatology, Dong-A University School of Medicine, Busan, Korea.
6. Department of Dermatology, Kyungpook National University School of Medicine, Daegu, Korea.
7. Department of Dermatology, Pusan National University School of Medicine, Busan, Korea.
8. Department of Dermatology, Chonnam National University School of Medicine, Gwangju, Korea.
9. Department of Dermatology, Kyung Hee University School of Medicine, Seoul, Korea.
10. Department of Dermatology, Chungbuk National University School of Medicine, Cheongju, Korea.
11. Department of Dermatology, Seoul National University School of Medicine, Seoul, Korea.
12. Department of Social and Preventive Medicine, Inha University School of Medicine, Incheon, Korea.
13. Department of Dermatology, Gwandong University School of Medicine, Gangneung, Korea.