... this article as: Müller et al.: The impact of study design and diagnostic approach in a large multi-centre ADHD study: Part 2: Dimensional measures of psychopathology and intelligence BMC Psychiatry ... Buitelaar J, Ebstein R, Eisenberg J, Gill M, Manor I, Miranda A, Oades RD, et al: The impact of study design and diagnostic approach in a large multi-centre ADHD study: Part 1: ADHD symptom patterns ... sibling, regardless of ADHD symptoms; DNA available from at least Page of 17 four genetic family members, including the proband with ADHD, at least one sibling, and at least one parent; and the age...