1. Internal Medicine and Dermatology, Department of Dietetics, University Medical Center Utrecht, Utrecht, The Netherlands
2. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands
3. Department of Surgery, University Medical Center Utrecht, Utrecht, The Netherlands
4. Department of Gastroenterology and Hepatology, University Medical Center Utrecht, Utrecht, The Netherlands
5. Department of Gastroenterology and Hepatology, Radboud University Medical Center, Nijmegen, The Netherlands