Funding for this research was provided by:
Ministerstwo Nauki i Szkolnictwa Wyższego
Received: 18 November 2020
Accepted: 16 February 2021
First Online: 2 March 2021
Ethics approval and consent to participate
: All procedures were approved by the Bioethics Committee at the Regional Medical Chamber in Gdansk (KB-10/16). Study protocol was constructed according to the Declaration of Helsinki, and all participants gave their written consent, were fully informed prior to participation, informed about the possibility of withdrawal at any time for any reason and were given the opportunity to view their results.
: Not applicable.
: The authors declare that they have no competing interests.