Olszowiec-Chlebna, M.
Koniarek-Maniecka, A.
Brzozowska, A.
Błauż, A.
Rychlik, B.
Stelmach, I. http://orcid.org/0000-0002-1475-8221
Article History
Received: 16 January 2019
Accepted: 15 March 2019
First Online: 29 March 2019
Ethics approval and consent to participate
: Informed consent was obtained from all subjects and their parents and the study was approved by the local ethical committee no RNN/21/14/KE.
: Not applicable.
: The authors declare that they have no competing interests.
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