Galli, Alberto
Di Fiore, Paola
D’Arrigo, Giacomo
Uggetti, Carla
Squarza, Silvia
Leone, Massimo
D’Amico, Domenico
Frediani, Fabio
Article History
First Online: 12 June 2018
Compliance with ethical standards
: The study was approved by the institute ethics committee.
: The authors declare that they have no conflict of interest.