Kocer, Hasan
Butun, Serkan
Palacios, Edgar
Liu, Zizhuo
Tongay, Sefaattin
Fu, Deyi
Wang, Kevin
Wu, Junqiao
Aydin, Koray
Article History
Received: 3 March 2015
Accepted: 21 July 2015
First Online: 21 August 2015
Competing interests
: The authors declare no competing financial interests.