1. Department of Gastroenterology and Hepatology Radboud University Medical Centre Nijmegen Netherlands
2. Department of Neurology, Translational Metabolic Laboratory Radboud University Medical Centre Nijmegen Netherlands
3. Department of Gastroenterology and Hepatology Leiden University Medical Centre Leiden Netherlands
4. Department of Gastroenterology and Hepatology Erasmus Medical Centre Rotterdam Rotterdam Netherlands
5. Department of Gastroenterology and Hepatology University Medical Centre Groningen Groningen Netherlands