Frank Verhulst is professor and director of child and adolescent psychiatry at Erasmus University Rotterdam, The Netherlands. His main research interest is in child psychiatric epidemiology, with a focus on longitudinal research. He is editor-in-chief of the Journal of Child Psychology and Psychiatry. He is the author of over 200 peer reviewed articles, and (co-)author of several books written in Dutch or English.
Jeremy Turk is Professor Developmental Psychiatry and Head of Academic Child & Adolescent Mental Health at St. George's, University of London, and Honorary Consultant Child & Adolescent Psychiatrist, South West London & St. George's Mental Health NHS Trust where he is Clinical Team Leader on the Child Mental Health Learning Disability Service and Trustwide Clinical Lead for Child & Adolescent Mental Health Services. He is also Consultant Psychiatrist to the National Autistic Society Centre for Social & Communication Disorders and President of the Royal Society of Medicine Intellectual Disability Forum.