Efstathopoulos, P
Kourgiantaki, A
Karali, K
Sidiropoulou, K
Margioris, A N
Gravanis, A
Charalampopoulos, I
Article History
Received: 11 January 2015
Revised: 28 September 2015
Accepted: 2 October 2015
First Online: 24 November 2015
Competing interests
: The authors declare no conflict of interest.