Received: 19 January 2021
Accepted: 30 June 2021
First Online: 12 July 2021
: In line with the provisions set forth in the Declaration of Helsinki the seniors were informed about the purpose of the study and the course of activities to be conducted within the framework of the study. They gave their consent to participate in the research project. This project was approved of by the Bioethics Committee at the University of Rzeszow and was assigned the number 9/11/2017.
: Not applicable.
: The authors declare that they have no competing interests.