1. Department of Dermatology, Yanbian University Hospital, Yanji, Jilin Province, China
2. Department of Dermatology and Cutaneous Biology Research Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
3. Department of Pathology, Yanbian University College of Medicine, Yanji, Jilin Province, China
4. Oral Cancer Research Institute, Yonsei University College of Dentistry, Seoul, Korea
5. Institute for the Integration of Medicine and Innovative Technology, Hanyang University College of Medicine, Seoul, Korea
6. BK21 PLUS Project, Department of Dental Education, Yonsei University College of Dentistry, Seoul, Korea