1. Laboratory of General Biochemistry and Physical Pharmacy, University of Gent, Harelbekestraat 72, 9000 Gent, Belgium
2. Laboratory of Biochemistry and Molecular Cytology, University of Gent, Coupure Links 653, 9000 Gent, Belgium
3. Unilever Research Laboratories Vlaardingen, Olivier van Noortlaan 120, 3133AT Vlaardingen, The Netherlands
4. Utrecht Institute for Pharmaceutical Sciences, Department of Pharmaceutics, University of Utrecht, 3508 TB Utrecht, The Netherlands