Kemna, A. [P:(DE-HGF)0] ; Weigand, M. [P:(DE-HGF)0] ; Kelter, M. [P:(DE-HGF)0] ; Pfeifer, J. [P:(DE-Juel1)140327] ; Zimmermann, E. [P:(DE-Juel1)133962] ; Walter, A. [P:(DE-HGF)0]