Ratanabanangkoon, P. [P:(DE-Juel1)VDB7601] ; Gropper, M. [P:(DE-Juel1)VDB7602] ; Merkel, R. [P:(DE-Juel1)128833] ; Sackmann, M. J. [P:(DE-Juel1)VDB7604] ; Gast, A. P. [P:(DE-Juel1)VDB7605]