1. Department of Pediatric Gastrenterology Centro Hospitalar Universitário São João Porto Portugal
2. Department of Pediatrics Centro Hospitalar Universitário São João Porto Portugal
3. Department of Obstetrics, Gynecology and Pediatrics, Faculty of Medicine University of Porto Porto Portugal
4. Department of Children and Youth Hospital Professor Doutor Fernando Fonseca Amadora Portugal
5. Department of Pediatrics, Hospital Sousa Martins Unidade Local de Saúde da Guarda Guarda Portugal
6. Department of Gastrenterology Centro Hospitalar Universitário São João Porto Portugal
7. Department of Pediatric Surgery Centro Hospitalar Universitário São João Porto Portugal