Catherine Wood

Attention-deficit hyperactivity disorder: a category or a continuum? Genetic analysis of a large-scale twin study.

M. Mcstephen, I. Waldman, D. Hay, 1997, Journal of the American Academy of Child and Adolescent Psychiatry.

Twin sibling differences in parental reports of ADHD, speech, reading and behaviour problems.

I Waldman, I. Waldman, D. Hay, 1996, Journal of child psychology and psychiatry, and allied disciplines.