The International Multicenter persistent ADHD CollaboraTion, IMpACT, was founded in 2007. The members of IMpACT, including researchers from Europe and the Americas, have maintained a stable core of collaborative interactions over many years. To enable further growth of the collaboration, IMpACT members founded the ECNP Network ‘ADHD across the Lifespan’ under the umbrella of the European College of Neuropsychopharmacology, ECNP; they operate under the name IMpACT & ECNP Network ‘ADHD across the Lifespan’ since.