Zhu, Liping
Lü, Xinmiao
Wang, Junbo
Peng, Ping
Kasper, Thomas
Daut, Gerhard
Haberzettl, Torsten
Frenzel, Peter
Li, Quan
Yang, Ruimin
Schwalb, Antje
Mäusbacher, Roland
Article History
Received: 10 November 2014
Accepted: 23 July 2015
First Online: 21 August 2015
Competing interests
: The authors declare no competing financial interests.