1. Centre for Pharmaceutical Nanotechnology and Nanotoxicology, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark;
2. Molecular Targeting and Polymer Toxicology Group, School of Pharmacy, University of Brighton, Brighton BN2 4GJ, United Kingdom
3. Department of Micro- and Nanotechnology, Technical University of Denmark, 2800 Lyngby, Denmark