1. Department of Orthpaedic Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
2. Medical Research Institute, Department of Orthopaedic Surgery, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, Republic of Korea
3. Department of Orthopaedic Surgery, Grossman School of Medicine, New York University, New York, NY, USA
4. Gerling Institute, Brooklyn, NY, USA