1. Division of Paediatric Gastroenterology and Hepatology Department of Paediatrics Cliniques Universitaires Saint Luc Université catholique de Louvain Brussels Belgium
2. Division of Paediatric Radiology Department of Radiology Cliniques Universitaires Saint Luc Université catholique de Louvain Brussels Belgium
3. Department of Paediatrics Centre Hospitalier du Luxembourg Luxembourg Luxembourg
4. Division of Paediatric Surgery Department of Surgery Cliniques Universitaires Saint Luc Université catholique de Louvain Brussels Belgium