Lazzeri, D.
Nicoli, F.
Article History
Received: 4 December 2018
Accepted: 31 December 2018
First Online: 5 January 2019
Compliance with ethical standards
:
: None of the authors has financial conflicts or interests to report in association with the contents of this paper.
: This article is a review of the literature and does not contain any studies with human participants or animals performed by any of the authors.
: No informed consent is available.