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authors.forename: Katherine M
authors.initials: KM
authors.lastname: Keyes
authors.forename: George Davey
authors.initials: GD
authors.lastname: Smith
authors.forename: Ezra
authors.initials: E
authors.lastname: Susser
mesh_terms: D015982:Bias; D015986:Confounding Factors, Epidemiologic; D006801:Humans; D016555:Matched-Pair Analysis; D035781:Siblings; D018433:Twin Studies as Topic / Q000379:methods*
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