Sampino, S
Juszczak, G R
Zacchini, F
Swiergiel, A H
Modlinski, J A
Loi, P
Ptak, G E
Article History
Received: 17 September 2013
Revised: 4 February 2014
Accepted: 25 February 2014
First Online: 29 April 2014
Competing interests
: The authors declare no conflict of interest.