Schäfer, Ingo
Kohn, Barbara
Volkmann, Maria
Müller, Elisabeth
Funding for this research was provided by:
Open Access funding enabled and organized by Projekt DEAL.
Article History
Received: 7 October 2020
Accepted: 6 February 2021
First Online: 25 February 2021
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.