Familial aggregation of ADHD characteristics. - Epstein,J.N.; Conners,C.K.; Erhardt,D.; Arnold,L.E.; Hechtman,L.; Hinshaw,S.P.; Hoza,B.; Newcorn,J.H.; Swanson,J.M.; Vitiello,B. (J Abnorm Child Psychol, 2000)