Received: 20 November 2020
Accepted: 8 January 2021
First Online: 23 January 2021
Ethics approval and consent to participate
: The study was presented to the Ethics Committee of the Province of Vorarlberg (EK-0.04-289) and does not require any referral or vote by the Ethics Committee of the Province of Vorarlberg.
: The authors declare that they have no competing interests.
: Not applicable.