1. Department of Orthopedic Surgery, College of Medicine, Seoul National University, SMG-SNU Boramae Medical Center, Seoul, Korea;
2. Department of Orthopedic Surgery, YanBian University Hospital, Yanji, China
3. Research & Development Center, CG Bio Co. Ltd. Seongnam-si, Gyeonggi-do, Korea;
4. Institute of Medical and Biological Engineering, Medical Research Center, Seoul National University, Medical Research Center, Seoul, Korea;