1. Nanoscience Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
2. Department of Biotechnology, University of Turku, Kiinamyllynkatu 10, 20520 Turku, Finland
3. Department of Clinical Physiology, Nuclear Medicine & PET and Cluster for Molecular Imaging, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
4. Department of Biomedical Sciences, University of Copenhagen, Blegdamsvej 3, 2200 Copenhagen, Denmark