Funding for this research was provided by:
Ministerstwo Nauki i Szkolnictwa Wyższego (002 / RID / 2018/19)
Received: 30 July 2019
Accepted: 11 June 2020
First Online: 17 June 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the Pomeranian Medical University (KB-0080/169/09) and carried out in accordance with The Code of Ethics of The World Medical Association (Declaration of Helsinki). Informed consent was obtained from all participants.
: Not applicable.
: The authors declare no competing interests.