Graw, Jan A.
Eymann, Katja
Kork, Felix
Zoremba, Martin
Burchard, Rene
Article History
Received: 16 July 2017
Accepted: 12 February 2018
First Online: 17 February 2018
Ethics approval and consent to participate
: The Medical Ethics Committee of the Medical Council Westphalia-Lippe approved this study (number of ethical approval: 2015–424-f-S). Written informed consent was obtained from all study subjects survey before participation.
: Not applicable.
: The authors declare that they have no competing interests.
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