title: NAS-NRC Twin Registry 1995 survey.
authors: W F
authors: WF
authors: Page
mesh_terms: D000368:Aged; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D009307:National Academy of Sciences, U.S.; D012042:Registries; D011795:Surveys and Questionnaires / Q000191:economics; D014427:Twins; D014481:United States