AUTHORS: Olesova, D., Galba, J., Piestansky, J., Celusakova, H., Repiska, G., Babinska, K., Ostatnikova, D., Katina, S., Kovac, A.. ABSTRACT: Autism spectrum disorder is a heterogeneous neurodevelopmental disease. Currently, no biomarker of this disease is known. Diagnosis is performed through observation, standardized behavioral scales, and interviews with parents. In practice, diagnosis is often delayed to