De Giorgi, Vincenzo
Scarfì, Federica
Gori, Alessia
Topa, Alessandro
Trane, Luciana
Portelli, Francesca
Covarelli, Piero
Article History
Received: 15 November 2018
Revised: 24 January 2019
Accepted: 4 March 2019
First Online: 22 March 2019
Competing interests
: The authors declare no competing interests.
: This work is published under the standard license to publish agreement. After 12 months the work will become freely available and the license terms will switch to a Creative Commons Attribution 4.0 International (CC BY 4.0).