Heitbrink, D. [P:(DE-Juel1)VDB584] ; Sigurdson, H. [P:(DE-HGF)0] ; Bolwien, C. [P:(DE-Juel1)VDB135] ; Brzezinski, P. [P:(DE-HGF)0] ; Heberle, J. [P:(DE-Juel1)VDB572]