Schmitt, Elke
Meybohm, Patrick
Herrmann, Eva
Ammersbach, Karin
Endres, Raphaela
Lindau, Simone
Helmer, Philipp
Zacharowski, Kai
Neb, Holger
Article History
Received: 12 February 2019
Accepted: 20 September 2019
First Online: 22 November 2019
Ethics approval and consent to participate
: The study was approved by the local ethics committee (Goethe University Frankfurt am Main, ref. 8/14 from 30 January 2014), which waived the need for informed consent.
: Not applicable.
: The authors declare that they have no competing interests.