1 Parkinson's Disease and Movement Disorders Unit (D.V., E.T.), Neurology Service, ICN, Hospital Clínic, University of Barcelona, Spain; Pediatric Neurology Research Group (A.M.-G., A.M.), Vall d'Hebron Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Spain; Electrophysiology Unit (J.V.-S.), Neurology Service, ICN, Hospital Clinic, University of Barcelona, Spain; Institut August Pi I Sunyer Biomedical Research Institute (IDIBAPS) (J.V.-S., E.T.).