¹ Leuven Intestinal Failure and Transplantation (LIFT); Pathology Department, University Hospitals Leuven, Leuven, Belgium, ² Leuven Intestinal Failure and Transplantation (LIFT); Abdominal Transplant Surgery, University Hospitals Leuven, Leuven, Belgium and Department of Microbiology and Immunology, KULeuven, Leuven, Belgium, ³ Department of General Surgery, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre, Maastricht, The Netherlands, ⁴ Birmingham Children's Hospital and University Hospitals Birmingham, Birmingham, United Kingdom, ⁵ Gastroenterology, Beaujon Hospitals, Paris, France, ⁶ Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, The Netherlands

MedStar Georgetown Transplant Institute

¹ Department of Pediatric Gastroenterology and Hepatology, University Hospital, Bordeaux, France, ² Department of Pediatric Gastroenterology, APHP Hôpital Necker Enfants Malades, Paris, France, ³ Department of Gastroenterology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK, ⁴ Pediatric Gastrointestinal and Nutrition Unit, University Hospital La Paz, Madrid, Spain, ⁵ Gastroenterology Unit, University Hospital La Paz, Madrid, Spain, ⁶ Paediatric, Hepatology, Gastroenterology and Transplantation, Hospital Papa Giovanni XXIII, Bergamo, Italy

¹ Medical Department, Division of Hepatology and Gastroenterology, Charité – Universitätsmedizin Berlin, Berlin, Germany, ² Department of Internal Medicine and Gastroenterology, Asklepios Klinik St. Georg, Hamburg, Germany

University of Miami/Jackson Memorial Hospital, Miami, Florida, USA

¹ Division of Gastroenterology, Hepatology and Nutrition, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada, ² Group for Improvement of Intestinal Function and Treatment (GIFT), The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada, ³ Division of Gastroenterology and Hepatology, Seattle Children’s, Seattle, WA, USA, ⁴ Division of Hematology and Oncology, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada, ⁵ Division of General and Thoracic Surgery, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada

Department of Surgery, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre, Maastricht, The Netherlands

¹ Alberta Children's Hospital, ² University of Calgary, ³ Hôpital Necker-Enfants Malades, ⁴ Departments of Pediatric Gastroenterology, Nutrition and HPN Centre

Miami Transplant Institute, University of Miami, Miami, Florida, USA

¹ University Medical Center Rostock, Department of Medicine II, Division of Gastroenterology, ² University Medical Center Rostock, Department of General, Thoracic, Vascular and Transplantation Surgery, ³ University Medical Center Rostock, Institute of Experimental Surgery