Hu, Shihu
Zeng, Raymond J.
Haroon, Mohamed F.
Keller, Jurg
Lant, Paul A.
Tyson, Gene W.
Yuan, Zhiguo
Article History
Received: 15 September 2014
Accepted: 2 February 2015
First Online: 3 March 2015
Competing interests
: The authors declare no competing financial interests.