1. Stratingh Institute for Chemistry; University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
2. Groningen Biomolecular Sciences and Biotechnology Institute; University of Groningen; Nijenborgh 7 9747 AG Groningen The Netherlands
3. Department of Nuclear Medicine and Molecular Imaging; University of Groningen, University Medical Center Groningen; Hanzeplein 1 9713 GZ Groningen The Netherlands
4. Department of Radiology; University of Groningen, University Medical Center Groningen; Hanzeplein 1 9713 GZ Groningen The Netherlands