Cheng, Kai [P:(DE-HGF)0] ; Lu, Zhenzhou [P:(DE-HGF)0] ; Xiao, Sinan [P:(DE-Juel1)185940] ; Zhang, Xiaobo [P:(DE-HGF)0] ; Oladyshkin, Sergey [P:(DE-HGF)0] ; Nowak, Wolfgang [P:(DE-HGF)0]