Cetin, Mehmet Onur [P:(DE-HGF)0] ; Pogorelov, Alexej [P:(DE-HGF)0] ; Lintermann, Andreas [P:(DE-Juel1)165948] ; Cheng, Hsun-Jen [P:(DE-HGF)0] ; Meinke, Matthias [P:(DE-HGF)0] ; Schröder, Wolfgang [P:(DE-HGF)0]