Received: 28 July 2020
Accepted: 9 November 2020
First Online: 3 December 2020
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Review Board at the Ludwig-Maximilians-Universität in Munich, Germany (opinion date 21 December 2018, number 18–889) and adhered to the most recent version of the Declaration of Helsinki. Adminstrative permissions to access raw data were not required. Data were irreversibly anonymised prior to analysis.
: Not applicable.
: The authors declare that they have no competing interests.