1 Department of Clinical Neuroscience and Osher Center, Karolinska Insitutet, Department of Neuroradiology, Karolinska University Hospital and Stockholm Spine Center, Stockholm, Sweden.
2 St Vincent's Clinical School, UNSW Australia, Sydney, Australia.
3 Division of Neurological Pain Research and Therapy, Department of Neurology, Universitaetsklinikum Schleswig-Holstein, Campus Kiel, Kiel, Germany.
4 Department of Neuroscience, CIBER of Mental Health, CIBERSAM, University of Cadiz, Spain.
5 Pain Research, Department of Surgery and Cancer, Imperial College, Chelsea and Westminster Hospital Campus, London S10 9NH, United Kingdom.