1. Department of Nuclear Medicine, University Hospital Bonn, Bonn, Germany
2. Department of Surgery, University Hospital Bonn, Bonn, Germany
3. Department of General and Visceral Surgery, Johanniter-Krankenhaus Bonn, Bonn, Germany
4. Institute of Radiology and Nuclear Medicine, PET-CT Center, Bonn, Germany
5. Institute of Pathology, University Hospital Bonn, Bonn, Germany
6. Department of Nuclear Medicine, Bethesda Hospital, Duisburg, Germany