Funding for this research was provided by:
Received: 23 April 2020
Accepted: 5 August 2020
First Online: 20 August 2020
Ethics approval and consent to participate
: All participants provided written informed consent. Furthermore, all procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study was approved by the responsible Ethics Committees (EK 310/13, Medical Faculty of RWTH Aachen University; 4909-14, Medical Faculty of the Ruhr University Bochum; 042-14-27012014, Medical Faculty of the University of Leipzig).
: All participants provided consent to publish all anonymized data reported in this publication.
: All authors declare that they have no competing interest.