Stergiou, George S
Myrsilidi, Aikaterini
Kollias, Anastasios
Destounis, Antonios
Roussias, Leonidas
Kalogeropoulos, Petros
Article History
Received: 8 February 2015
Revised: 28 June 2015
Accepted: 2 July 2015
First Online: 3 September 2015
Competing interests
: The authors declare no conflict of interest.