Sintermann, J. [P:(DE-HGF)0] ; Ammann, C. [P:(DE-HGF)0] ; Kuhn, U. [P:(DE-Juel1)8844] ; Spirig, C. [P:(DE-HGF)0] ; Hirschberger, R. [P:(DE-HGF)0] ; Gärtner, A. [P:(DE-HGF)0] ; Neftel, A. [P:(DE-HGF)0]