The prevalence and correlates of adult ADHD in the United States: results from the National Comorbidity Survey Replication - Kessler, RC; Adler, L; Barkley, R; Biederman, J; Conners, CK; Demler, O; Faraone, SV; Greenhill, LL; Howes, MJ; Secnik, K; Spencer, T; Ustun, TB; Walters, EE; Zaslavsky, AM (Am J Psychiatry, 2006)