Leventakou, V
Sarri, K
Georgiou, V
Chatzea, V
Frouzi, E
Kastelianou, A
Gatzou, A
Kogevinas, M
Chatzi, L
Article History
Received: 31 July 2014
Revised: 8 January 2015
Accepted: 7 May 2015
First Online: 17 June 2015
Competing interests
: The authors declare no conflict of interest.