1. Department of Gastroenterology, City Children’s Hospital, Ho Chi Minh City 700000, Vietnam
2. Faculty of Medicine, Université Libre de Bruxelles, 1020 Brussels, Belgium
3. Department of Gastroenterology, Children’s Hospital 2, Ho Chi Minh City 700000, Vietnam
4. Department of Microbiology and Parasitology, University of Medicine and Pharmacy, Ho Chi Minh City 700000, Vietnam
5. Department of Genetics, University of Science—Vietnam National University Ho Chi Minh City, Ho Chi Minh City 700000, Vietnam
6. Department of Biostatistics and Informatics, Pham Ngoc Thach University of Medicine, Ho Chi Minh City 700000, Vietnam
7. Department of Surgery, City Children’s Hospital, Ho Chi Minh City 700000, Vietnam
8. Faculty of Medicine, Pham Ngoc Thach University of Medicine, Ho Chi Minh City 700000, Vietnam
9. Faculty of Public Health, Pham Ngoc Thach University of Medicine, Ho Chi Minh City 700000, Vietnam
10. Institut de Recherche Expérimentale et Clinique, Pôle d’Épidémiologie et Biostatistique, Université Catholique de Louvain, 1200 Brussels, Belgium
11. Department of Gastroenterology, Hôpital Universitaire des Enfants Reine Fabiola, 1020 Brussels, Belgium