Acker, K. [P:(DE-HGF)0] ; Möller, D. [P:(DE-HGF)0] ; Wieprecht, W. [P:(DE-HGF)0] ; Meixner, F. X. [P:(DE-HGF)0] ; Bohn, B. [P:(DE-Juel1)2693] ; Gilge, S. [P:(DE-HGF)0] ; Plass-Dülmer, Ch. [P:(DE-HGF)0] ; Berresheim, H. [P:(DE-HGF)0]