1. Department of Dermatology, International St. Mary’s Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea
2. Kangskin Dermatology Clinic, Seoul, Korea
3. Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea
4. Department of Dermatology, Yanbian University Hospital, Yanji, China