Keeble, D.J. [P:(DE-HGF)0] ; Wicklein, S. [P:(DE-Juel1)VDB95416] ; Dittmann, R. [P:(DE-Juel1)VDB5464] ; Ravelli, L. [P:(DE-HGF)0] ; Mackie, R.A. [P:(DE-HGF)0] ; Egger, W. [P:(DE-HGF)0]