Yang, X. [P:(DE-Juel1)138922] ; Klotzsche, A. [P:(DE-Juel1)129483] ; Meles, G. [P:(DE-HGF)0] ; Vereecken, H. [P:(DE-Juel1)129549] ; van der Kruk, J. [P:(DE-Juel1)129561]