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Article History

Received: 19 April 2018

Revised: 28 May 2018

Accepted: 6 June 2018

First Online: 6 July 2018

Compliance with ethical standards

:

: The scientific guarantor of this publication is Prof. Dr. David Maintz, University Hospital of Cologne (david.maintz@uk-koeln.de).

: The authors of this paper declare no relationships with any companies whose products or services may be related to the subject matter of the article.

: No complex statistical methods were necessary for this paper.

: Written informed consent was not required for this study because this study involved no patients. Participation in the questionnaire was voluntary and had no relation to the students’ curricular activities. Respondents were informed on the nature and purpose of the questionnaire and anonymity was guaranteed.

: Institutional Review Board approval was not required because this study involved no patients. Participation in the questionnaire was voluntary and had no relation to the students’ curricular activities. Respondents were informed on the nature and purpose of the questionnaire and anonymity was guaranteed.

: • prospective• cross-sectional study• multicentre study