1. Pain in Motion International Research Group; Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education and Physiotherapy (KIMA), Vrije Universiteit Brussel; and Department of Neurosurgery, Universitair Ziekenhuis Brussel, Brussels, Belgium
2. Pain in Motion International Research Group; Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education and Physiotherapy (KIMA), Vrije Universiteit Brussel, Building F-KIMA, Laarbeeklaan 103, BE-1090 Brussels, Belgium; I-CHER, Interuniversity Center for Health Economics Research; Department of Public Health (GEWE), Faculty of Medicine and Pharmacy, Vrije Universitei
3. Pain in Motion International Research Group; Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education and Physiotherapy (KIMA), Vrije Universiteit Brussel; and Department of Physical Medicine and Physiotherapy, Universitair Ziekenhuis Brussel
4. Department of Neurosurgery, Universitair Ziekenhuis Brussel; Center for Neurosciences, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel; and Department of Manual Therapy (MANU), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel
5. Interuniversity Center for Health Economics Research, Vrije Universiteit Brussel and Department of Public Health (GEWE), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel
6. Department of Public Health (GEWE), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel and Department of Biostatistics and Medical Informatics, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel
7. International Spine and Pain Institute, Story City, Iowa
8. Department of Physical Medicine and Revalidation, Sint-Dimpna Ziekenhuis Geel, Geel, Belgium
9. Pain in Motion International Research Group and Department of Physiotherapy, Human Physiology and Anatomy, Faculty of Physical Education and Physiotherapy (KIMA), Vrije Universiteit Brussel, Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, Ghent University