Varma, R.M. [P:(DE-HGF)0] ; Venables, D.S. [P:(DE-HGF)0] ; Ruth, A.A. [P:(DE-HGF)0] ; Heimann, U. [P:(DE-HGF)0] ; Schlosser, E. [P:(DE-Juel1)VDB26256] ; Dixneuf, S. [P:(DE-HGF)0]