1. Thame UK
2. Oxford Oxfordshire UK
3. Haukeland University Hospital; Regional Centre of Excellence in Palliative Care; Bergen Norway
4. Imperial College London; Pain Research, Department of Surgery and Cancer, Faculty of Medicine; London UK SW10 9NH
5. Technische Universität München; Department of Neurology, Klinikum Rechts der Isar; Möhlstrasse 28 Munich Germany 81675
6. University of Oxford; Pain Research and Nuffield Department of Clinical Neurosciences (Nuffield Division of Anaesthetics); Churchill Hospital Oxford UK OX3 7LJ
7. Plymouth UK