Huang, Kun
Liu, Hong
Garcia-Vidal, Francisco J.
Hong, Minghui
Luk’yanchuk, Boris
Teng, Jinghua
Qiu, Cheng-Wei
Article History
Received: 16 October 2014
Accepted: 27 March 2015
First Online: 5 May 2015
Competing interests
: The authors declare no competing financial interests.