1. Center for Joint Preservation and Replacement, Rubin Institute for Advanced Orthopedics, Baltimore, Maryland
2. Department of Orthopaedics, Philadelphia College of Osteopathic Medicine, Philadelphia, Pennsylvania
3. Center for Joint Preservation and Replacement, Rubin Institute for Advanced Orthopaedics, Sinai Hospital of Baltimore, Baltimore, Maryland
4. Department of Orthopaedic Surgery, Beth Israel Medical Center, New York, New York