Al-Abyad, M. [P:(DE-HGF)0] ; Spahn, Ingo [P:(DE-Juel1)131849] ; Spellerberg, Stefan [P:(DE-Juel1)131850] ; Comsan, M. N. H. [P:(DE-HGF)0] ; Qaim, Syed M. [P:(DE-Juel1)131840] ; Coenen, Heinrich Hubert [P:(DE-Juel1)131816]