Received: 31 July 2018
Revised: 7 January 2019
Accepted: 19 February 2019
First Online: 19 March 2019
Compliance with ethical standards
: The scientific guarantor of this publication is Daniele Bernardeschi.
: 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.
: Written informed consent was obtained from all subjects (patients) in this study.
: Institutional Review Board approval was obtained.
: • prospective• cross-sectional study• performed at one institution