title: Defining the natural history of MS: the need for complete data and rigorous definitions.
authors.forename: C
authors.initials: C
authors.lastname: Confavreux
mesh_terms: D018450:Disease Progression; D006801:Humans; D020528:Multiple Sclerosis, Chronic Progressive / Q000145:classification* / Q000503:physiopathology*; D020529:Multiple Sclerosis, Relapsing-Remitting / Q000145:classification* / Q000503:physiopathology*