Article History
Received: 22 May 2019
Revised: 16 July 2019
Accepted: 23 July 2019
First Online: 10 September 2019
Compliance with ethical standards
:
: The scientific guarantor of this publication is Maxime Ronot.
: The authors of this manuscript 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.
: Not applicable
: Not applicable
: • retrospective• cross-sectional study• performed at one institution