Akritidis, D. [P:(DE-HGF)0] ; Zanis, P. [P:(DE-HGF)0] ; Katragkou, E. [P:(DE-HGF)0] ; Schultz, Martin [P:(DE-Juel1)6952] ; Tegoulias, I. [P:(DE-HGF)0] ; Poupkou, A. [P:(DE-HGF)0] ; Markakis, K. [P:(DE-HGF)0] ; Pytharoulis, I. [P:(DE-HGF)0] ; Karacostas, Th. [P:(DE-HGF)0]