1. Department of Dermatology, Yongin Severance Hospital, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Yongin, Korea.
2. Department of Dermatology, Gangnam Severance Hospital, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Dermatology, National Health Insurance Service Ilsan Hospital, Goyang, Korea.
4. Department of Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.