title: Comment on: 'Prevalence of brain magnetic resonance imaging meeting Barkhof and McDonald criteria for dissemination in space among headache patients'.
authors.affiliation: Department of Neurology/Neuroimmunology and Multiple Sclerosis Centre of Catalonia (Cemcat), Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Spain.
authors.forename: Angela
authors.initials: A
authors.lastname: Vidal-Jordana
authors.affiliation: Department of Neurology/Neuroimmunology and Multiple Sclerosis Centre of Catalonia (Cemcat), Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Spain mtintore@cem-cat.org.
authors.forename: Mar
authors.initials: M
authors.lastname: Tintoré
authors.affiliation: Unitat de Ressonància Magnètica (Servei de Radiología), Hospital Vall d'Hebron, Spain.
authors.forename: Alex
authors.initials: A
authors.lastname: Rovira
authors.affiliation: Department of Neurology/Neuroimmunology and Multiple Sclerosis Centre of Catalonia (Cemcat), Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Spain.
authors.forename: Xavier
authors.initials: X
authors.lastname: Montalban