Kaufmann, Kai B. http://orcid.org/0000-0002-9511-6633
Baar, Wolfgang
Glatz, Torben
Hoeppner, Jens
Buerkle, Hartmut
Goebel, Ulrich
Heinrich, Sebastian
Article History
Received: 29 January 2019
Accepted: 18 August 2019
First Online: 22 August 2019
Ethics approval and consent to participate
: The Medical Ethics Committee of the University of Freiburg approved the study (EK569/14 December 9th 2014).
: Not applicable.
: The authors declare that they have no competing interests.