Roger A. Barker BA, MBBS, MRCP, PhD, FMedSci, John van Geest Centre for Brain Repair and Department of Neurology, Department of Clinical Neuroscience, University of Cambridge, Cambridge, UK. Francesca Cicchetti PhD, Centre de Recherche du CHU de Québec (CHUQ), Université Laval, Québec, Canada. Emma S.J. Robinson PhD, FBPhS, School of Physiology, Pharmacology & Neuroscience, University of Bristol, Bristol, UK.