Karatay, M
Koktekir, E
Celik, H
Erdem, Y
Sertbas, I
Bayar, M A
Article History
Received: 11 August 2014
Revised: 5 October 2014
Accepted: 8 October 2014
First Online: 6 March 2015
Competing interests
: The authors declare no conflict of interest.