De Nicola, Francesco
Castrucci, Paola
Scarselli, Manuela
Nanni, Francesca
Cacciotti, Ilaria
De Crescenzi, Maurizio
Article History
Received: 18 September 2014
Accepted: 27 January 2015
First Online: 26 February 2015
Competing interests
: The authors declare no competing financial interests.