Kahnt, A. [P:(DE-HGF)0] ; Herrmann, H. [P:(DE-HGF)0] ; Mentel, T. F. [P:(DE-Juel1)16346] ; Fisseha, R. [P:(DE-HGF)0] ; Kiendler-Scharr, A. [P:(DE-Juel1)4528]