Received: 25 February 2019
Accepted: 16 June 2020
First Online: 23 July 2020
Ethics approval and consent to participate
: The study was approved by the Institutional Ethics Committee of the Medical University of Silesia. Informed written consent was obtained from all study subjects.
: Not applicable.
: There are no conflicts of interest that could be perceived as prejudicing the impartiality of the research reported.