1. Division of Neurological Pain Research and Therapy and Department of Neurology; Christian-Albrechts-Universität Kiel; Kiel Germany
2. Department of Neurology; University of Wisconsin; Madison Wisconsin
3. CRILifetree Research; Salt Lake City Utah
4. Neurosurgery Department; Walton Centre for Neurology and Neurosurgery; Liverpool UK
5. Neurosurgery Department; Shands-Jacksonville Neuroscience Institute; University of Florida College of Medicine; Jacksonville Florida USA
6. Anesthesiology, Pain and Palliative Care; Radboud University Nijmegen Medical Centre; Nijmegen The Netherlands
7. Centre d'Evaluation et de traitement de la douleur and INSERM U 987, Hôpital Ambroise Paré, APHP; Boulogne-Billancourt France
8. Université Versailles Saint Quentin; Versailles France
9. Anaesthesia and Pain Management Center for Neuromodulation; EHC-Hospital, Morges & CHUV; Lausanne Switzerland
10. Department of Neurology and Psychiatry; La Sapienza University; Rome Italy
11. Anesthesia Critical Care and Pain Management Department; Valencia University Medical School, General University Hospital; Valencia Spain
12. Pain Center; Karolinska University Hospital (Solna) and Karolinska Institutet; Stockholm Sweden
13. Department of Psychiatry and Biobehavioral Sciences, Department of Anesthesiology; David Geffen School of Medicine at UCLA Medical Center; Los Angeles California USA
14. Neurological Surgery; University of Washington; Seattle Washington USA
15. Department of Anesthesiology and Internal Medicine, Centers for the Rehabilitation of Pain Syndromes; David Geffen School of Medicine at UCLA Medical Center; Los Angeles California USA
16. California Pain Medicine Centers; Los Angeles California USA
17. Institute of Anesthesiology, Critical Care Medicine & Comprehensive Pain Management; Cleveland Clinic; Cleveland Ohio USA
18. HEOR & Strategic Market Access; Mapi; Lyon France
19. Clinical Research Department, Neuromodulation Division; Medtronic International Trading Sàrl; Tolochenaz Switzerland
20. Institute of Health Research; University of Exeter Medical School; Exeter UK