Kluszczyński, Marek
Mosler, Dariusz
Wąsik, Jacek
Article History
Received: 14 July 2022
Accepted: 14 September 2022
First Online: 2 November 2022
Declarations
:
: This study was approved by the Jan Dlugosz University in Czestochowa Ethics Committee KE-U/7/2021, and conducted under the Declaration of Helsinki. All the parents of the subjects were kept informed of the purpose and process of examination and subsequently gave their written consent before the study.
: All the parents of the subjects were kept informed of the purpose and process of examination and subsequently gave their written consent before the study.
: The authors declare no conflict of interest.
: All the parents of the subjects were kept informed of the purpose and process of examination and subsequently gave their written consent for publication before the study.
: The authors of this study confirm that all methods were carried out in accordance with relevant guidelines and regulations.