Buia, Alexander http://orcid.org/0000-0002-8090-5453
Hopf, Hans-Bernd
Herrmann, Eva
Schmandra, Thomas
Hanisch, Ernst
Article History
Received: 9 August 2019
Accepted: 2 March 2020
First Online: 17 March 2020
Ethics approval and consent to participate
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: All authors declare that they have no competing interests.