Anxiety and depression in twin and sib pairs extremely discordant and concordant for neuroticism: prodromus to a linkage study
GENESiS: creating a composite index of the vulnerability to anxiety and depression in a community-based sample of siblings
Genetic and environmental influences on a measure of infant attachment security
Genetics of testosterone and the aggression-hostility-anger (AHA) syndrome: a study of middle-aged male twins
Netherlands twin family study of anxious depression (NETSAD)
Parents' and teachers' ratings of problem behaviours in children: genetic and contrast effects