1. Department of Surgery, Cancer Centre Amsterdam, Amsterdam, the Netherlands
2. Division of Surgical Oncology, Department of Surgery, University of Colorado Anschutz Medical Campus, Denver, Colorado, USA
3. Department of Surgery, Erasmus Medical Centre, Rotterdam, the Netherlands
4. Department of Surgery, University Medical Centre Utrecht, Utrecht, the Netherlands
5. Department of Endocrinology, Amsterdam Gastroenterology and Metabolism, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands