Yuan, Y. [P:(DE-HGF)0] ; Du, Juan [P:(DE-Juel1)144673] ; Wirtz, Marius [P:(DE-Juel1)129811] ; Luo, G. [P:(DE-HGF)0] ; Lu, G.-H. [P:(DE-HGF)0] ; Liu, W. [P:(DE-HGF)0]