1. Department of Orthopaedic Surgery, University of Tennessee Health Science Center College of Medicine, Chattanooga, TN, USA
2. Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago, Chicago, IL, USA
3. Department of Orthopaedic Surgery, University at Buffalo Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, NY, USA