1. Department of Chemistry, Surface and Corrosion Science, Royal Institute of Technology, Drottning Kristinas väg 51, SE-100 44 Stockholm, Sweden
2. Institute of Chemistry, Eötvös University, P.O. Box 32, 1518 Budapest 112, Hungary
3. Department of Polymer Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania
4. YKI, Institute for Surface Chemistry, P.O. Box 5607, SE-114 86 Stockholm, Sweden