Gensch, T. [P:(DE-Juel1)131924] ; Hofkens, J. [P:(DE-HGF)0] ; Koehn, F. [P:(DE-HGF)0] ; Vosch, T. [P:(DE-HGF)0] ; Herrmann, A. [P:(DE-HGF)0] ; Muellen, K. [P:(DE-HGF)0] ; de Schryver, F. C. [P:(DE-HGF)0]