Ibach, H. [P:(DE-Juel1)VDB5414] ; Bruchmann, D. [P:(DE-Juel1)VDB26216] ; Vollmer, R. [P:(DE-HGF)0] ; Etzkorn, M. [P:(DE-HGF)0] ; Anil Kumar, P. S. [P:(DE-HGF)0] ; Kirschner, J. [P:(DE-HGF)0]