Latent Class and Factor Analysis of DSM-IV ADHD: A Twin Study of Female AdolescentsJames J. Hudziak, Richard D. Todd, Andrew C. Heath et al.|Journal of the American Academy of Child & Adolescent Psychiatry|1998Cited by 252
Contributions of parental alcoholism, prenatal substance exposure, and genetic transmission to child ADHD risk: a female twin studyValerie S. Knopik, Andrew C. Heath, Richard D. Todd et al.|Psychological Medicine|2005Cited by 201
Evaluation of ADHD Typology in Three Contrasting Samples: A Latent Class ApproachRosalind J. Neuman, Theodore Reich, Richard D. Todd et al.|Journal of the American Academy of Child & Adolescent Psychiatry|1999Cited by 171
Familiality and Heritability of Subtypes of Attention Deficit Hyperactivity Disorder in a Population Sample of Adolescent Female TwinsRichard D. Todd, Andrew C. Heath, Erik Rasmussen et al.|American Journal of Psychiatry|2001Cited by 170
A Twin Study of Inattentive, Aggressive, and Anxious/Depressed BehaviorsJames J. Hudziak, Richard D. Todd, Lawrence P. Rudiger et al.|Journal of the American Academy of Child & Adolescent Psychiatry|2000Cited by 157