Helmecke, M. R. [P:(DE-HGF)0] ; Fehrenbacher, G. [P:(DE-Ds200)OR0285] ; Gostishchev, V. [P:(DE-Ds200)OR0369] ; Hettinger, R. [P:(DE-Ds200)OR5267] ; Knie, Klaus [P:(DE-Ds200)OR2110] ; Lang, R. [P:(DE-Ds200)OR0692] ; Fitting, J. [P:(DE-HGF)0]