1. Division of Digestive Diseases, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine St Mary's Hospital Campus, Imperial College London London UK
2. Departments of Gastroenterology and Hepatology St Mary's Hospital, Imperial College Healthcare NHS Trust London UK
3. Section of Bioinformatics, Division of Systems Medicine, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine Imperial College London London UK
4. Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, National Phenome Centre, IRDB Building, Hammersmith House Campus Imperial College London London UK
5. Section of Bioanalytical Chemistry, Division of Systems Medicine, Department of Metabolism, Digestion and Reproduction Imperial College London London UK
6. Department for Diagnostics Institute for Clinical Chemistry and Laboratory Medicine, University Hospital Hamburg‐Eppendorf Hamburg Germany
7. MRC Centre for Molecular Bacteriology and Infection Imperial College London London UK
8. Laboratory of Analytical Chemistry, Department of Chemistry Aristotle University of Thessaloniki Thessaloniki Greece
9. Biomic_Auth, Bioanalysis and Omics Laboratory Center for Interdisciplinary Research and Innovation (CIRI‐AUTH) Thessaloniki Greece
10. Division of Gastroenterology, Hepatology, and Endoscopy Brigham and Women's Hospital Boston Massachusetts USA
11. Harvard Medical School Boston Massachusetts USA