1. Department of Radiation Oncology, Universitair Ziekenhuis Leuven, 3000 Leuven, Belgium
2. LUCAS KU Leuven Center for Care Research & Consultancy, 3000 Leuven, Belgium
3. Department of Abdominal Surgery, Universitair Ziekenhuis Leuven, 3000 Leuven, Belgium
4. Department of Digestive Oncology, Universitair Ziekenhuis Leuven, 3000 Leuven, Belgium