Barczuk-Falęcka, Marzena http://orcid.org/0000-0003-3772-7302
Małek, Łukasz A.
Krysztofiak, Hubert
Roik, Danuta
Brzewski, Michał
Article History
Received: 8 October 2017
Accepted: 23 February 2018
First Online: 8 March 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The study protocol was approved by the Institutional Ethical Committee, and the study was performed in accordance with ethical standards. The examination procedures were explained to the parents and participants before obtaining signature on a written consent for the study.
: Informed consent was obtained from all individual participants included in the study.
: This article does not contain any studies with animals performed by any of the authors.