Article History
Received: 23 November 2018
Revised: 5 January 2019
Accepted: 12 February 2019
First Online: 27 February 2019
Compliance with ethical standards
:
: The scientific guarantor of this publication is Prof. Dr. Marc Dewey.
: The authors of this manuscript declare no relevant relationships with companies and no conflicts of interest.
: No complex statistical methods were necessary for this paper.
: Not required for this anonymised survey.
: Not required for this anonymised survey.
: • Prospective