1. Phillip Spiegel Orthopaedic Research Laboratory, Foundation for Orthopaedic Research and Education, Tampa, FL, USA.
2. Florida Orthopaedic Institute, Tampa, FL, USA.
3. Department of Orthopedic Surgery, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.