Received: 5 December 2020
Accepted: 29 January 2021
First Online: 18 February 2021
Ethics approval and consent to participate
: The study was conducted in accordance with the Declaration of Helsinki Ethical Principles and Good Clinical Practices. The Local Ethics Committee of the Medical University of Warsaw approved the study, and all participants signed their written informed consent (Ref no. KB/150/2013).
: Not applicable.
: The authors declare that they have no competing interests.