Stanzione, R
Sciarretta, S
Marchitti, S
Bianchi, F
Di Castro, S
Scarpino, S
Cotugno, M
Frati, G
Volpe, M
Rubattu, S
Article History
Received: 8 September 2015
Revised: 16 November 2015
Accepted: 17 November 2015
First Online: 31 December 2015
Competing interests
: The authors declare no conflict of interest.