title: Commentary: The birth of the twin study--a commentary on Francis Galton's 'The history of twins'.
authors.affiliation: Department of History and Lyman Briggs College, Michigan State University, East Lansing, MI, USA. wallerj1@msu.edu
authors.forename: John C
authors.initials: JC
authors.lastname: Waller
mesh_terms: D004200:Diseases in Twins / Q000453:epidemiology* / Q000235:genetics*; D059647:Gene-Environment Interaction; D006801:Humans; D014427:Twins