title: Defining the natural history of MS: the need for complete data and rigorous definitions.
authors.forename: Helen
authors.initials: H
authors.lastname: Tremlett
authors.forename: Yinshan
authors.initials: Y
authors.lastname: Zhao
authors.forename: Virginia
authors.initials: V
authors.lastname: Devonshire
mesh_terms: D018450:Disease Progression; D006801:Humans; D009103:Multiple Sclerosis / Q000503:physiopathology*; D020528:Multiple Sclerosis, Chronic Progressive / Q000503:physiopathology*; D020529:Multiple Sclerosis, Relapsing-Remitting / Q000503:physiopathology*