Received: 6 November 2020
Accepted: 9 July 2021
First Online: 24 July 2021
: The study was approved by the Ethics Committee of the Medical University of Vienna (3<sup>rd</sup> August 2018) and complied with the principles as outlined in the declaration of Helsinki. Participants gave formal written consent to participate in the study by their response.
: Not applicable.
: The authors declare that they have no competing interests.