1. Department of Orthopaedic Surgery, Division of Physical Medicine and Rehabilitation Washington University in St. Louis School of Medicine St. Louis Missouri USA
2. Department of Surgery, Division of Public Health Sciences Washington University in St. Louis School of Medicine St. Louis Missouri USA
3. Washington University in St. Louis School of Medicine St. Louis Missouri USA
4. Department of Neurology, Division of Physical Medicine and Rehabilitation St. Louis Missouri USA
5. Saint Louis University School of Medicine St. Louis Missouri USA
6. Division of Biostatistics Washington University in St. Louis School of Medicine St. Louis Missouri USA
7. Department of Orthopaedic Surgery, Division of Adult Reconstruction and Hip Preservation Washington University in St. Louis School of Medicine St. Louis Missouri USA
8. Department of Physical Medicine and Rehabilitation Weill Cornell Medical College New York City New York USA