1. School
of Pharmacy, University of Eastern Finland, POB 1627, FI-70211 Kuopio, Finland
2. Department of Pharmaceutical
Analysis, Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat
72, 9000 Ghent, Belgium
3. Department of Applied Physics, University of Eastern Finland, POB 1627, FI-70211 Kuopio, Finland