Funding for this research was provided by:
Università degli Studi dell’Aquila
Received: 9 April 2020
Accepted: 24 October 2020
First Online: 1 December 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The protocol conformed to internationally accepted policy statements regarding the use of human participants, in accordance with the Declaration of Helsinki, and ethical approval was agreed by the ethical committee of the institution Novi Sad University.
: Informed consent was obtained from all the parents/legal guardians of participants (because of their minor age), after they were given a thorough explanation of the purpose, benefits, and potential risks of participating in the study.