Kuhnt, Wolfgang
Holbourn, Ann
Xu, Jian
Opdyke, Bradley
De Deckker, Patrick
Röhl, Ursula
Mudelsee, Manfred
Article History
Received: 27 August 2013
Accepted: 20 November 2014
First Online: 6 January 2015
Competing interests
: The authors declare no competing financial interests.