1. International Joint Center, Acibadem University Hospital, Istanbul, Turkey.
2. Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA, USA.
3. Department of Orthopedic Surgery, Daejeon Eulji Medical Center, Eulji University School of Medicine, Daejeon, Korea.
4. Kay Joint Center at Cheil Orthopaedic Hospital, Seoul, Korea.
5. Seoul National University Bundang Hospital, Seongnam, Korea.