1. Department of Neurology, University Hospital Würzburg, Würzburg, Germany
2. Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
3. División Anestesiología, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
4. Millennium Nucleus for the Study of Pain (MiNuSPain), Santiago Chile
5. Alan Edwards Centre for Research on Pain, McGill University, Montreal, QC, Canada
6. Neurological Surgery and Anesthesia and Pain Medicine, University of Washington, Seattle, WA, United States