Wurzler, S. [P:(DE-HGF)0] ; Hebbinghaus, H. [P:(DE-HGF)0] ; Schmidt, L. [P:(DE-HGF)0] ; Straub, W. [P:(DE-HGF)0] ; Gladtke, D. [P:(DE-HGF)0] ; Olschewski, A. [P:(DE-HGF)0] ; Friesel, J. [P:(DE-HGF)0] ; Geiger, J. [P:(DE-HGF)0] ; Elbern, H. [P:(DE-Juel1)129194] ; Friese, E. [P:(DE-HGF)0]