1. Division
of Oncological Imaging, Department of Oncology, University of Alberta, 11560 University Avenue, Edmonton, Alberta T6G 1Z2, Canada
2. Laboratory
of Molecular Imaging and Nanomedicine, National Institute of Biomedical
Imaging and Bioengineering, National Institutes of Health, 9000 Rockville
Pike, Bethesda, Maryland 20892, United States
3. Department
of Chemistry and Chemical Biology, Technical University of Dortmund, 44227 Dortmund, Germany
4. Department
of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada