Gennai, Alessandro
d’Angelo, Giorgio
Article History
Received: 4 April 2018
Accepted: 21 May 2018
First Online: 20 June 2018
Compliance with ethical standards
:
: The authors received no financial support for the research, authorship, and publication of this article.
: Alessandro Gennai and Giorgio d’Angelo declare that they have no conflict of interest.
: All procedures performed were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required.