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In March 2015 started the European study ASDEU (http://asdeu.eu/), which is dedicated to the autism spectrum disorders. ASDEU includes assessment of the socio-economic costs of the patients with autism and their families. The survey is designed for patients with autism, their parents, relatives and people who care about them. The study is fully anonymous. The recorded answers contain no identifying information and will be treated in accordance with legal provisions on the protection of personal data. The survey is entirely online at: http://asdeu.limequery.com/survey/index/sid/785733/newtest/Y/lang/bg