Funding for this research was provided by:
Deutsche Zentralbibliothek für Medizin (ZBMED)
Article History
Received: 16 April 2021
Accepted: 14 December 2021
First Online: 24 January 2022
Declarations
Ethics approval and consent to participate: Not applicable.
Consent for publication: Not applicable.
Competing interests: The authors declares that they have no competing interests.