Kulmala, M. [P:(DE-HGF)0] ; Kerminen, V.-M. [P:(DE-HGF)0] ; Anttila, T. [P:(DE-Juel1)VDB45939] ; Laaksonen, A. [P:(DE-HGF)0] ; O'Dowd, K. A. [P:(DE-HGF)0]