1. Paediatric Gastroenterology, Hepatology and Obesity department Queen Fabiola Children's University Hospital, Universite Libre de Bruxelles Brussels Belgium
2. Bacteriology Brussels Academic Hospital Lab. Horta, Schaerbeek and Porte de Hal Campus Brussels Belgium
3. Pathology UVC Brugmann Brussels Belgium
4. School of Public Health Universite Libre de Bruxelles Brussels Belgium