Received: 7 November 2020
Accepted: 16 February 2021
First Online: 22 February 2021
Ethics approval and consent to participate
: The study was approved by the Bioethics Committee of the Regional Medical Chamber (Resolution No. 88/B/2020 of September 24, 2020). As only retrospective studies were performed, according to Polish law patient consent was not required.
: Not applicable.
: All authors declare no conflicts of interest.