Huo, Haohua
Shen, Xiaodong
Wang, Chuanyong
Zhang, Lilu
Röse, Philipp
Chen, Liang-An
Harms, Klaus
Marsch, Michael
Hilt, Gerhard
Meggers, Eric
Article History
Received: 4 August 2014
Accepted: 23 September 2014
First Online: 5 November 2014
Competing interests
: The authors declare no competing financial interests.