Janowska-Miasik, Ewelina
Waśkiewicz, Anna
Witkowska, Anna Maria
Drygas, Wojciech
Markhus, Maria Wik
Zujko, Małgorzata Elżbieta
Kjellevold, Marian https://orcid.org/0000-0001-7070-5784
Article History
Received: 18 June 2020
Accepted: 31 January 2021
First Online: 9 February 2021
Ethics approval and consent to participate
: Not applicable. Only secondary data was used.
: Not applicable.
: The authors declare no conflict of interest.