1. Institute of Pharmacy, University of Innsbruck, Innrain 52c, 6020 Innsbruck, Austria
2. Department of Drug Form Technology, Wroclaw Medical University, Borowska 211A, 50-556 Wroclaw, Poland
3. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, Okolna 2, 50-950 Wroclaw, Poland
4. School of Pharmacy, University of East Anglia, Norwich Research Park, NR4 7TJ Norwich, U.K.