1. From the Hospital Universitari Vall d'Hebron (A.V.-J., A.R., G.A., J.C., D.M., K.R., A.D.B., A.S., C.A., J.S.-G., M.T., X.M.), Barcelona, Spain; Vall d'Hebron Research Institute (VHIR) (W.C.), Universitat Autònoma de Barcelona, Spain; University College London (UCL) (S.C., A.T.T., O.C.), United Kingdom; Institute of Neurology (O.C.), London, United Kingdom; University Hospital Basel (A.P., N.C.-F., J.M.L.), Switzerland; San Camillo-Forlanini Hospital (S.R., C.T., C.G.), Rome, Italy; University of...