Kocak, M. [P:(DE-HGF)0] ; Horstmann, M. [P:(DE-HGF)0] ; Ventzke, J. C. [P:(DE-HGF)0] ; Bram, M. [P:(DE-Juel1)129591] ; Laptev, A. M. [P:(DE-Juel1)VDB897] ; Buchkremer, H. P. [P:(DE-Juel1)129594]