Viola, Stefano
Viola, Paolo
Buongarzone, Maria P.
Fiorelli, Luisa
Cipulli, Mafalda
Litterio, Pasqualino
Article History
First Online: 12 June 2018
Compliance with ethical standards
: All procedures 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. Informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no conflict of interest.