Jan K. Buitelaar is a Dutch medical doctor, psychiatrist, author, and academic. He is a professor of psychiatry and child and adolescent psychiatry at Radboud University Medical Centre and former Head of Child and Adolescent Psychiatry at Karakter Child and Adolescent Psychiatry. Buitelaar's research interests span the fields of neuropsychiatry and developmental disorders, with a particular focus on autism and Attention deficit hyperactivity disorder (ADHD). He has led research projects focusing on ADHD, autism, aggressive behavior, and emotional problems in children, adolescents, and adults. He has authored three books aimed at a broader audience including Het is ADHD, Dit is ADHD, and Handboek ADHD en comorbide stoornissen. Additionally, he has written several book chapters and published over 1200 articles. Buitelaar is a Fellow of the International Society for Autism Research, vice-president of the World Federation of ADHD, member and treasurer of the Steering Committee of Eunethydis, and a member of the European ADHD Guidelines Group. He has served as a Co-Editor and Chief Editor of European Child and Adolescent Psychiatry. Source: Wikipedia (en)