Siegert, Thomas
Diehl, Roland
Greiner, Jochen
Krause, Martin G. H.
Beloborodov, Andrei M.
Bel, Marion Cadolle
Guglielmetti, Fabrizia
Rodriguez, Jerome
Strong, Andrew W.
Zhang, Xiaoling
Article History
Received: 6 August 2015
Accepted: 4 January 2016
First Online: 29 February 2016
Competing interests
: The authors declare no competing financial interests.