1. K. Kulig, PT, PhD, is Associate Professor of Clinical Physical Therapy, Division of Biokinesiology and Physical Therapy, University of Southern California, 1540 E Alcazar St, CHP-155, Los Angeles, CA 90089-9006 (USA).
2. G.J. Beneck, PT, MS, OCS, is a PhD candidate in the Division of Biokinesiology and Physical Therapy, University of Southern California, and Lecturer, Department of Physical Therapy, California State University–Long Beach, Long Beach, California.
3. D.M. Selkowitz, PT, PhD, OCS, DAAPM, is Professor, Department of Physical Therapy Education, Western University of Health Sciences, Pomona, California.
4. J.M. Popovich Jr, PT, DPT, ATC, CSCS, is a PhD candidate in the Division of Biokinesiology and Physical Therapy, University of Southern California.
5. T.T. Ge, PhD, is Biostatistician, Johnson and Johnson, San Diego, California.
6. S.P. Flanagan, PhD, ATC, CSCS, is Associate Professor, Department of Kinesiology, California State University, Northridge, Northridge, California.
7. E.M. Poppert, PT, DPT, OCS, is Adjunct Assistant Professor of Clinical Physical Therapy, Division of Biokinesiology and Physical Therapy, University of Southern California.
8. K.A. Yamada, PT, DPT, OCS, ATC, CSCS, is Instructor of Clinical Physical Therapy, Division of Biokinesiology and Physical Therapy, University of Southern California.
9. C.M. Powers, PT, PhD, is Associate Professor, Division of Biokinesiology and Physical Therapy, University of Southern California.
10. S. Azen, PhD, is Professor and Co-Director of Biostatistics, Department of Preventive Medicine, Keck School of Medicine, University of Southern California.
11. C.J. Winstein, PT, PhD, FAPTA, is Professor, Division of Biokinesiology and Physical Therapy, University of Southern California.
12. J. Gordon, PT, EdD, FAPTA, is Associate Dean and Chair, Division of Biokinesiology and Physical Therapy, University of Southern California.
13. S. Samudrala, MD, FACS, is Neurosurgeon, Cedars-Sinai Spine Center, Los Angeles, California.
14. T.C. Chen, MD, PhD, is Associate Professor of Neurological Surgery, Department of Neurological Surgery, Keck School of Medicine, University of Southern California.
15. A.N. Shamie, MD, is Assistant Professor of Orthopaedic Surgery, Department of Orthopaedic Surgery, Santa Monica–UCLA Medical Center and Orthopaedic Hospital, Santa Monica, California.
16. L.T. Khoo, MD, is Assistant Professor, Department of Orthopaedic Surgery, Santa Monica–UCLA Medical Center and Orthopaedic Hospital.
17. M.J. Spoonamore, MD, is Assistant Professor of Orthopaedic Surgery, Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California.
18. J.C. Wang, MD, is Professor of Orthopaedic Surgery, Department of Orthopaedic Surgery, Santa Monica–UCLA Medical Center and Orthopaedic Hospital.