1. Molecular Targeting and Polymer Toxicology Group, School of Pharmacy, University of Brighton, Brighton BN2 4GJ, U.K.
2. Centre for Pharmaceutical Nanotechnology and Nanotoxicology, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
3. Department of Micro- and Nanotechnology, DTU-Nanotech, Technical University of Denmark, Frederiksborgvej, DK-4000 Roskilde, Denmark