title: Adjustment of twin data for the effects of age and sex.
mesh_terms: D000367:Age Factors; D001699:Biometry / Q000379:methods; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D008297:Male; D008954:Models, Biological; D011247:Pregnancy; D012737:Sex Factors; D014427:Twins