Trimboli, Pierpaolo
Fulciniti, Franco
Merlo, Elisabetta
Barizzi, Jessica
Mazzucchelli, Luca
Giovanella, Luca
Article History
First Online: 2 February 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflicts 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. For the present retrospective study formal consent was not required.