title: Evidence that the north-south gradient of multiple sclerosis may not have disappeared.
authors.forename: William B
authors.initials: WB
authors.lastname: Grant
authors.forename: Luca
authors.initials: L
authors.lastname: Mascitelli
mesh_terms: D004784:Environmental Monitoring / Q000379:methods*; D005260:Female; D005843:Geography / Q000639:trends*; D006801:Humans; D008297:Male; D009103:Multiple Sclerosis / Q000453:epidemiology*; D012727:Sex Characteristics; D014808:Vitamin D Deficiency / Q000453:epidemiology*