Bahn, Jae Hoon
Ahn, Jaegyoon
Lin, Xianzhi http://orcid.org/0000-0001-9802-9896
Zhang, Qing
Lee, Jae-Hyung http://orcid.org/0000-0002-5085-6988
Civelek, Mete
Xiao, Xinshu
Article History
Received: 3 September 2014
Accepted: 22 January 2015
First Online: 9 March 2015
Competing interests
: The authors declare no competing financial interests.