1. Department of Dermatology Yonsei University Wonju College of Medicine Wonju South Korea
2. Department of Preventive Medicine Yonsei University Wonju College of Medicine Wonju South Korea
3. Department of Dermatology St. Vincent's Hospital, College of Medicine, The Catholic University of Korea Suwon South Korea
4. Department of Dermatology Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea Seoul South Korea