Ewertowska, Marlena
Grześk, Elżbieta
Urbańczyk, Anna
Dąbrowska, Anna
Bąbol-Pokora, Katarzyna
Łęcka, Monika
Kołtan, Sylwia
Article History
Received: 31 July 2019
Accepted: 23 March 2020
First Online: 1 April 2020
Ethics approval and consent to participate
: The local Research Ethics Board has given permission for publication numer 161/2014. Parents agreed to publish photos.
: Not applicable.
: The authors declare that they have no competing interests.