EMA: Concept paper on the development of medicinal products for the treatment of autism spectrum disorder

Autism spectrum disorders (ASDs) are a group of neurodevelopmental disabilities with symptoms typically presenting before the age of 3 years and persisting into adulthood. They are described as \"spectrum disorders\" because they affect each person in a variety of different ways and can range from very mild to severe. Delay in language development, impairment of social interaction, and restrictive, stereotyped behaviour patterns are characteristic features.