1. From the Departments of Gastroenterology (Digestive Oncology) and Nuclear Medicine and Radiology, University Hospital Ghent, Ghent, Belgium; Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, Groningen, The Netherlands; Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht, The Netherlands; and Department of Pharmaceutical Analysis, Drug Quality and Registration, Ghent University, Ghent, Belgium