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Authors
Čagalová, Alžbeta
Tichá, Ľubica
Gaál Kovalčíková, Alexandra
Šebeková, Katarína
Podracká, Ľudmila
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Article History
Received: 21 April 2021
Revised: 1 July 2021
Accepted: 6 July 2021
First Online: 22 July 2021
Declarations
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: The study was conducted following the guidelines of the Declaration of Helsinki. Ethical approval of the study protocol was granted by the Ethics Committee of The National Institute of Children’s Diseases, Bratislava, Slovakia.
: Written informed consent was obtained from all individual participants’ parents/guardians. Also, all participants’ parents/guardians signed the written informed consent after the study purpose and procedures had been explained.
: There is no doubt that anonymity can be maintained.
: The authors declare no competing interests.
