Funding for this research was provided by:
Javna Agencija za Raziskovalno Dejavnost RS (P3-0395)
Article History
Received: 15 July 2019
Revised: 3 October 2019
Accepted: 29 October 2019
First Online: 28 November 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study received ethical approval from The National Medical Ethics Committee of Republic of Slovenia (approval number 0120-66/2016-2, KME 67/02/16). All participants received accurate information on the study. Informed consent was obtained from all individual participants included in the study (from one of the parents in case of children and in case of adolescents, both from one parent and the participating adolescent).