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Article History

First Online: 25 May 2020

Compliance with Ethical Standards

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: The authors declare that they have no conflict of interest.

: All of the study authors and research assistants complied with ethical standards in the treatment of participants. This study was reviewed and approved by the University of Latvia Ethics Committee for Humanities and Social Sciences. All procedures were in accordance with the ethical principles of the 1964 Helsinki declaration and its later amendments.

: Parents were informed and passive consent was received, meaning that the parents were advised to indicate if they did not want their adolescent to participate in the study. Active informed consent was obtained from all adolescents included in the study.