1. Gastroenterology Department, Centro Hospitalar Universitário de São João, Porto, Portugal
2. Physical Medicine and Rehabilitation Department, Centro Hospitalar Universitário de São João, Porto, Portugal
3. Gastroenterology Department, Centro Hospitalar Lisboa Norte, Lisboa, Portugal
4. Gastroenterology Department, Centro Hospitalar de Setúbal, Setúbal, Portugal
5. Gastroenterology Department, Centro Hospitalar e Universitário de Coimbra Coimbra, Portugal
6. Gastroenterology Department, Centro Hospitalar Universitário Algarve, Faro, Portugal
7. Gastroenterology Department, IPO Lisboa, Lisboa, Portugal
8. Gastroenterology Department, Centro Hospitalar Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
9. Gastroenterology Department, Centro Hospitalar de Trás-os-Montes e Alto Douro, Vila Real, Portugal
10. Gastroenterology Department, IPO Coimbra, Coimbra, Portugal
11. Gastroenterology Department, Centro Hospitalar Lisboa Central, Lisboa, Portugal
12. Gastroenterology Department, Hospital do Divino Espírito Santo de Ponta Delgada, Ponta Delgada, Portugal
13. Gastroenterology Department, Hospital Beatriz Ângelo, Loures, Portugal
14. Gastroenterology Department, Centro Hospitalar Porto, Porto, Portugal
15. Gastroenterology Department, Centro Hospitalar Tondela-Viseu, Tondedla-Visue, Portugal
16. Gastroenterology Department, Centro Hospitalar de Leiria, Leiria, Portugal
17. Gastroenterology Department, Centro Hospitalar de Castelo-Branco, Castelo-Branco, Portugal
18. Gastroenterology Department, IPO Porto, Porto, Portugal
19. Gastroenterology Department, Hospital Senhora da Oliveira, Guimarães Braga, Portugal
20. Life and Health Sciences Research Institute, School of Medicine, University of Minho, Braga/Guimarães, Braga, Portugal
21. ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Braga, Portugal
22. Gastroenterology Department, Hospital de Braga, Braga, Portugal
23. Gastroenterology Department, Hospital Central do Funchal, Madeira, Portugal