1. Department of Chemistry, University of Oslo, P.O. Box 1033, N-0315 Oslo, Norway
2. Department of Physical Chemistry, Faculty of Chemistry, University of Murcia, 30071 Murcia, Spain
3. Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), N-7491 Trondheim, Norway
4. Department of Pharmaceutics, School of Pharmacy, University of Oslo, P.O. Box 1068, Blindern, N-0316 Oslo, Norway