Funding for this research was provided by:
Medical Scientific Fund of the Major of the City of Vienna (17097)
Received: 26 October 2020
Accepted: 26 November 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: This study was approved by the ethics committee of the authors’ institution (No. EK 1775/2017) and performed according to the Declaration of Helsinki and the guidelines for Good Clinical Practice (GCP).
: Not applicable
: The authors declare that they have no competing interests.