1. Department of Pain Management, Summit Medical Group, Berkeley Heights, NJ, USA
2. Departments of Physiatry and Orthopedic Surgery, Hospital for Special Surgery, New York, NY, USA
3. Graduate Group of Biostatistics, Department of Statistics, University of California, Davis, CA, USA
4. Institute for Work and Health, Toronto, ON, Canada
5. Division of Biostatistics, Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
6. Department of Orthopedic Surgery, Seoul Sacred Heart General Hospital, Seoul, Korea
7. Department of Rehabilitation Medicine, New York University Grossman School of Medicine, New York, NY, USA
8. Division of Biostatistics, Department of Public Health Sciences, University of California, Davis, CA, USA
9. Center for Healthcare Policy and Research & Clinical and Translational Science Center Davis School of Medicine, University of California, Sacramento, CA, USA
10. Department of Anesthesiology, Duke University School of Medicine, Durham, NC, USA