Article History
Received: 28 January 2021
Revised: 28 January 2021
Accepted: 3 February 2021
First Online: 24 February 2021
Compliance with ethical guidelines
:
: M. Auer, G. Edlinger and A. Mölk declare that they have no competing interests.
: Ethics approval and consent to participate are not applicable to this study because only data that are anonymized were used.