Voigtsberger, J.
Zeller, S.
Becht, J.
Neumann, N.
Sturm, F.
Kim, H.-K.
Waitz, M.
Trinter, F.
Kunitski, M.
Kalinin, A.
Wu, J.
Schöllkopf, W.
Bressanini, D.
Czasch, A.
Williams, J. B.
Ullmann-Pfleger, K.
Schmidt, L. Ph H.
Schöffler, M. S.
Grisenti, R. E.
Jahnke, T.
Dörner, R.
Article History
Received: 10 July 2014
Accepted: 5 November 2014
First Online: 9 December 2014
Competing interests
: The authors declare no competing financial interests.