Antonella Lezo, Antonella Diamanti, Evelyne M. Marinier, Merit Tabbers, Anat Guz-Mark, Paolo Gandullia, Maria I. Spagnuolo, Sue Protheroe, Noel Peretti, Laura Merras-Salmio, Jessie M. Hulst, Sanja Kolaček, Looi C. Ee, Joanna Lawrence, Jonathan Hind, Lorenzo D’Antiga, Giovanna Verlato, Ieva Pukite, Grazia Di Leo, Tim Vanuytsel, Maryana K. Doitchinova-Simeonova, Lars Ellegard, Luisa Masconale, María Maíz-Jiménez, Sheldon C. Cooper, Giorgia Brillanti, Elena Nardi, Anna S. Sasdelli, Simon Lal, Loris Pironi, Regione Piemonte Azienda Ospedaliera - S. Anna [Turin, Italy] (OIRM-S), Ospedale Bambin Gesù [Rome, Italy] (OBG), Centre de Référence des Maladies Digestives Rares [AP-HP Hôpital Robert-Debré] (CRMDR), AP-HP Hôpital universitaire Robert-Debré [Paris], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Emma Children’s Hospital, Amsterdam UMC - Amsterdam University Medical Center, Schneider Children’s Medical Center [Petah Tikva, Israel] (SCMC), Tel Aviv University (TAU), IRCCS Istituto Giannina Gaslini [Genoa, Italy], University of Naples Federico II = Università degli studi di Napoli Federico II, Birmingham Women's and Children's NHS Foundation Trust, Cardiovasculaire, métabolisme, diabétologie et nutrition (CarMeN), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Hospices Civils de Lyon (HCL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Hôpital Femme Mère Enfant [CHU - HCL] (HFME), Hospices Civils de Lyon (HCL), Helsinki University Hospital [Finland] (HUS), Eramus MC-Sophia Children’s Hospital, Partenaires INRAE, Children’s Hospital Srebrnjak [Zagreb, Croatia], Children’s Health Queensland [Brisbane] (CHQ), Royal Children’s Hospital & Department of Paediatrics [Parkville, VIC, Australia], King‘s College London, Hospital Papa Giovanni XXIII (Hosp P Giovanni XXIII), Azienda Ospedale Università di Padova = Hospital-University of Padua (AOUP), Children's Clinical University Hospital [Riga, Latvia] (CCUH), Institute for Maternal and Child Health - IRCCS 'Burlo Garofolo' [Trieste], Leuven Intestinal Failure and Transplantation [Leuven, Belgium] (LIFT), University Hospitals Leuven [Leuven], Bulgarian Association of Patients with Malnutrition [Sofia, Bulgaria] (BAPM), Sahlgrenska University Hospital [Gothenburg], Ospedale Orlandi [Bussolengo, Italy] (2O), Hospital Universitario 12 de Octubre [Madrid], Alma Mater Studiorum University of Bologna (UNIBO), University of Bologna/Università di Bologna, Azienda Ospedaliero-Universitaria di Bologna [Bolohna, Italy] (AOUB), Salford Royal NHS Foundation Trust [Salford, UK], CarMeN, laboratoire, Pediatrics, Pediatric surgery, Clinicum, HUS Children and Adolescents, Children's Hospital, University of Helsinki, Paediatric Gastroenterology, AGEM - Amsterdam Gastroenterology Endocrinology Metabolism, ARD - Amsterdam Reproduction and Development, Lezo A., Diamanti A., Marinier E.M., Tabbers M., Guz-Mark A., Gandullia P., Spagnuolo M.I., Protheroe S., Peretti N., Merras-Salmio L., Hulst J.M., Kolacek S., Ee L.C., Lawrence J., Hind J., D'antiga L., Verlato G., Pukite I., Di Leo G., Vanuytsel T., Doitchinova-Simeonova M.K., Ellegard L., Masconale L., Maiz-Jimenez M., Cooper S.C., Brillanti G., Nardi E., Sasdelli A.S., Lal S., Pironi L., Lezo, Antonella, Diamanti, Antonella, Marinier, Evelyne M., Tabbers, Merit, Guz-Mark, Anat, Gandullia, Paolo, Spagnuolo, Maria I., Protheroe, Sue, Peretti, Noel, Merras-Salmio, Laura, Hulst, Jessie M., Kola( (c))ek, Sanja, Ee, Looi C., Lawrence, Joanna, Hind, Jonathan, D'Antiga, Lorenzo, Verlato, Giovanna, Pukite, Ieva, Di Leo, Grazia, Vanuytsel, Tim, Doitchinova-Simeonova, Maryana K., Ellegard, Lar, Masconale, Luisa, Ma('(i))z-Jim('(e))nez, Mar('(i))a, Cooper, Sheldon C., Brillanti, Giorgia, Nardi, Elena, Sasdelli, Anna S., Lal, Simon, and Pironi, Loris