Gabriel, F. [P:(DE-HGF)0] ; Heidelberger, A. [P:(DE-HGF)0] ; Rentsch, D. [P:(DE-HGF)0] ; Giger, W. [P:(DE-HGF)0] ; Günther, K. [P:(DE-Juel1)129325] ; Kohler, H.-P. [P:(DE-HGF)0]