1. Department of Internal Medicine, Faculty of Medicine, Centro Hospitalar São João, Porto, Portugal
2. Department of Internal Medicine, Centro Hospitalar Tâmega e Sousa – Hospital Padre Américo, Penafiel, Portugal
3. Unit of Pharmacology and Therapeutics, Department of Biomedicine, Faculty of Medicine, University of Porto, Porto, Portugal
4. MedInUP, Centre for Drug Discovery and Innovative Medicines, University of Porto, Porto, Portugal
5. Department of Gastroenterology, Mid Essex Hospital Services NHS Trust, Broomfield, Essex, United Kingdom
6. Instituto de Saúde Ambiental, Faculty of Medicine, University of Lisbon, Lisbon, Portugal
7. Department of Gastroenterology, Centro Hospitalar do Porto, Porto, Portugal
8. Department of Gastroenterology, Hospital de Braga, Braga, Portugal
9. Department of Gastroenterology, Centro Hospitalar e Universitário do Algarve – Portimão Unit, Portimão, Portugal
10. Department of Medicine and Medical Biosciences, University of Algarve, Faro, Portugal
11. Department of Gastroenterology, Faculty of Medicine, Centro Hospitalar São João, Porto, Portugal
12. Department of Community Medicine, Information and Health Decision Sciences, Faculty of Medicine, University of Porto, Porto, Portugal
13. CINTESIS – Centre for Health Technology and Services Research, Porto, Portugal