Stephan, C. [P:(DE-HGF)0] ; Strube, Cornelia [P:(DE-Juel1)169715] ; Klocke, D. [P:(DE-HGF)0] ; Ern, Manfred [P:(DE-Juel1)129117] ; Hoffmann, Lars [P:(DE-Juel1)129125] ; Preusse, Peter [P:(DE-Juel1)129143] ; Schmidt, H. [P:(DE-HGF)0]