Röckmann, T. [P:(DE-HGF)0] ; Walter, S. [P:(DE-HGF)0] ; Bohn, B. [P:(DE-Juel1)2693] ; Wegener, R. [P:(DE-Juel1)2367] ; Spahn, H. [P:(DE-Juel1)VDB65140] ; Brauers, T. [P:(DE-Juel1)16306] ; Tillmann, R. [P:(DE-Juel1)5344] ; Schlosser, E. [P:(DE-Juel1)VDB26256] ; Koppmann, R. [P:(DE-HGF)0] ; Rohrer, F. [P:(DE-Juel1)16347]