Article History
First Online: 6 December 2017
Compliance with Ethical Standards
:
: Author Roberto Marcone declares that he has no conflict of interest. Author Gaetana Affuso declares that she has no conflict of interest. Author Angela Borrone declares that she has no conflict of interest.
: All procedures performed in studies involving human participants 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.
: Informed consent was obtained from all individual participants included in the study.