Received: 26 June 2020
Accepted: 11 December 2020
First Online: 16 December 2020
Ethics approval and consent to participate
: The study was approved by our local ethics committee (IRB approved protocol number 23/17; leading ethics committee: Ethik-Kommission der Albert-Ludwigs-Universität Freiburg, Germany) and performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. All participants gave their written consent prior to their inclusion in the study.
: All other authors declare that there is no conflict of interest. Dominik S. Schoeb, Simon Hein, Philippe F. Pohlmann received Funding by the German Federal Ministry of Education and Research (BMBF), not related to the present work.