1. Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
2. Department of Surgery, Experimental Cancerology and Radiotherapy, University Hospital Ghent, Ghent, Belgium.
3. Department of Radiotherapy, Experimental Cancerology and Radiotherapy, University Hospital Ghent, Ghent, Belgium.
4. Department of Pathology, Experimental Cancerology and Radiotherapy, University Hospital Ghent, Ghent, Belgium.
5. Department of Gastroenterology, Experimental Cancerology and Radiotherapy, University Hospital Ghent, Ghent, Belgium.
6. Department of Nuclear Medicine, Experimental Cancerology and Radiotherapy, University Hospital Ghent, Ghent, Belgium.