Axt, Steffen
Storz, Pirmin
Ehrenberg, Carolin
Falch, Claudius
Immenroth, Marc
Kirschniak, Andreas
Muller, Sven
Article History
Received: 27 July 2016
Accepted: 18 April 2018
First Online: 2 May 2018
Ethics approval and consent to participate
: All participants verbally consented to participating in the study, which was approved by the local Ethics Committee University Tuebingen. No additional approval from the local Ethics Committee University Tuebingen was necessary.
: The authors declare that they have no competing interests.
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