Article History
Received: 12 May 2020
Accepted: 27 July 2020
First Online: 20 August 2020
Ethics approval and consent to participate
: Written informed consent was obtained from each participant and the study protocol was approved by the local Ethics Committee of the Otto-von-Guericke University Magdeburg, Germany: Reference number: 51/16.
: Not applicable.
: The authors declare that they have no competing interests.