Balestrini, Linda
Isolani, Maria Emilia
Pietra, Daniele
Borghini, Alice
Bianucci, Anna Maria
Deri, Paolo
Batistoni, Renata
Article History
Received: 26 November 2013
Accepted: 17 April 2014
First Online: 9 May 2014
Competing interests
: The authors declare no competing financial interests.