title: Effect of referral bias on assessing survival in als.
authors.forename: G
authors.initials: G
authors.lastname: Logroscino
authors.forename: E
authors.initials: E
authors.lastname: Beghi
authors.forename: O
authors.initials: O
authors.lastname: Hardiman
authors.forename: A
authors.initials: A
authors.lastname: Chio
authors.forename: J D
authors.initials: JD
authors.lastname: Mitchell
authors.forename: R J
authors.initials: RJ
authors.lastname: Swingler
authors.forename: B
authors.initials: B
authors.lastname: Traynor
mesh_terms: D000690:Amyotrophic Lateral Sclerosis / Q000401:mortality*; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D016021:Epidemiologic Studies; D005060:Europe / Q000453:epidemiology; D006801:Humans; D008910:Minnesota / Q000453:epidemiology; D018401:Sample Size; D015983:Selection Bias; D016019:Survival Analysis