Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (SFB936 Projekt A5)
Received: 20 September 2019
Accepted: 19 March 2020
First Online: 30 March 2020
Ethics approval and consent to participate
: Written informed consent was obtained from all participants. The study was approved by the local ethics committee, Chamber of Physicians, Hamburg, Germany, reference number PV4762.
: Not applicable
: The authors declare that they have no competing interests.