Sommer, A.
Bothschafter, E. M.
Sato, S. A.
Jakubeit, C.
Latka, T.
Razskazovskaya, O.
Fattahi, H.
Jobst, M.
Schweinberger, W.
Shirvanyan, V.
Yakovlev, V. S.
Kienberger, R.
Yabana, K.
Karpowicz, N.
Schultze, M.
Krausz, F.
Article History
Received: 16 August 2015
Accepted: 7 March 2016
First Online: 23 May 2016
Competing interests
: The authors declare no competing financial interests.