Article History
Received: 23 June 2018
Accepted: 11 September 2018
First Online: 4 October 2018
Compliance with ethical standards
:
: Giovanni Bubici declares that he has no conflict of interest. Maria Isabella Prigigallo declares that she has no conflict of interest. Mario Amenduni declares that he has no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.