Grabia, Szymon
Smyczynska, Urszula
Pagacz, Konrad
Fendler, Wojciech
Article History
Received: 7 April 2020
Accepted: 7 September 2020
First Online: 29 September 2020
Ethics approval and consent to participate
: Not applicable. Ethical approval for the study was not required since only data from public repositories were used.
: Not applicable.
: The authors declare that they have no competing interests.