Funding for this research was provided by:
Received: 22 June 2020
Accepted: 12 October 2020
First Online: 21 October 2020
Ethics approval and consent to participate
: The study was approved by the local Ethics Committee of the University Medical Center Schleswig–Holstein, Kiel, Germany (protocol identification: D519/18).
: Not applicable.
: The authors declare that they have no competing interests.