1. Danish Pain Research Center, Department of Clinical Medicine Aarhus University Aarhus Denmark
2. Department of Oncology Aarhus University Hospital Aarhus Denmark
3. Biostatistics, Department of Public Health Aarhus University Aarhus Denmark
4. Nuffield Department of Clinical Neuroscience University of Oxford UK
5. Brain Function Research Group, School of Physiology, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
6. Department of Neurology Aarhus University Hospital Aarhus Denmark
7. Department of Neurophysiology Aarhus University Hospital Aarhus Denmark