title: Recruitment bias in twin research: the rule of two-thirds reconsidered.
authors: D T
authors: DT
authors: Lykken
authors: M
authors: M
authors: McGue
authors: A
authors: A
authors: Tellegen
mesh_terms: D000328:Adult; D017326:Clinical Trials, Phase III as Topic; D005260:Female; D006801:Humans; D008297:Male; D012106:Research; D012737:Sex Factors; D014427:Twins / Q000523:psychology*; D014429:Twins, Dizygotic / Q000523:psychology*; D014430:Twins, Monozygotic / Q000523:psychology*