Funding for this research was provided by:
Ministry of Culture and Science of the State of North Rhine-Westphalia
German Federal Ministry of Health
Federal Ministry of Education and Research
Received: 27 November 2020
Accepted: 25 February 2021
First Online: 4 May 2021
Change Date: 1 November 2021
Change Type: Update
Change Details: The funding note was missing in the original publication. The article has been updated to rectify the error.
: The study was performed according to the Declaration of Helsinki, approved by the ethics committee of the Medical Faculty of Heinrich Heine University Düsseldorf. All participants gave written informed consent before inclusion in the study.
: All authors have seen and approved the manuscript being submitted.
: The authors declare no competing interests.