1. Drug Research Program; Division of Pharmaceutical Chemistry and Technology; Faculty of Pharmacy; University of Helsinki; Helsinki FI-00014 Finland
2. Leiden Institute of Chemistry; Leiden University; P.O. Box 9052, 2300 RA Leiden The Netherlands
3. Helsinki Institute of Life Science; University of Helsinki; FI-00014 Helsinki Finland
4. Laboratory of Industrial Physics; Department of Physics; University of Turku; FI-20014 Turku Finland
5. Department of Pharmaceutical Sciences Laboratory,; Turku Center for Biotechnology; Åbo Akademi University; FI-20520 Turku Finland