Wang, Yanpeng
Cheng, Xi
Shan, Qiwei
Zhang, Yi
Liu, Jinxing
Gao, Caixia
Qiu, Jin-Long
Article History
Received: 2 April 2014
Accepted: 27 June 2014
First Online: 20 July 2014
Competing interests
: The authors have filed a patent application (Chinese patent application number 201410027631.2) based on the results reported in this paper.