1. Department of Dermatology, Chung-Ang University College of Medicine, Seoul, Korea
2. Department of Dermatology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
3. Department of Orthopedic Surgery, Nanoori Hospital, Seoul, Korea
4. Department of Medicine, Graduate School, Chung-Ang University, Seoul, Korea
5. CK Exogene, Inc., Seongnam, Korea
6. Department of Dermatology, Chung-Ang University Gwang-Myeong Hospital, Chung-Ang University College of Medicine, Gwangmyeong, Korea