Gehlen, Jana [P:(DE-Juel1)169371] ; Esser, Stefan [P:(DE-Juel1)167220] ; Haselier, C. [P:(DE-HGF)0] ; Schaffrath, K [P:(DE-HGF)0] ; Johnen, S. [P:(DE-HGF)0] ; Walter, P. [P:(DE-HGF)0]