1. Department of Surgery, Digestive Surgery Service, Hospital Center of Porto, Porto, Portugal
2. Abel Salazar Biomedical Science Institute, University of Porto, Porto, Portugal
3. Gastroenterology Service, Hospital Center of Porto, Porto, Portugal
4. Service of Medical Oncology, Hospital Center of Porto, Porto, Portugal
5. Department of Health Community, Abel Salazar Biomedical Science Institute, University of Porto, Porto, Portugal
6. Molecular Oncology and Viral Pathology Group, IPO Research Center, Portuguese Oncologic Institute, Porto, Portugal
7. Research Department, Portuguese League Against Cancer, Porto, Portugal
8. CEBIMED, Faculty of Health Sciences of Fernando Pessoa, University of Porto, Porto, Portugal
9. Department of Pathology, Pathological Anatomy Service, Hospital Center of Porto, Porto, Portugal
10. Department of Pathology and Molecular Immunology, Abel Salazar Biomedical Science Institute, University of Porto, Porto, Portugal