1. Duke Clinical Research Institute, Duke University, and Department of Orthopaedic Surgery, Duke University, 200 Morris St, Durham, NC 22701 USA
2. Duke Clinical Research Institute, Department of Orthopedic Surgery, and Department of Population Health Sciences, Duke University
3. ATI Physical Therapy, Greenville, South Carolina, and Center for Effectiveness Research in Orthopaedics, University of South Carolina, Greenville, South Carolina
4. FAPTA, Duke Clinical Research Institute, and Department of Orthopedic Surgery, Duke University