Steyn, G. F. [P:(DE-HGF)0] ; Vermeulen, C. [P:(DE-HGF)0] ; Nortier, F. M. [P:(DE-HGF)0] ; Szelecsényi, F. [P:(DE-HGF)0] ; Kovacs, Z. [P:(DE-HGF)0] ; Qaim, S. M. [P:(DE-Juel1)VDB1300]