1. Gastroenterology Department, Hospital do Divino Espírito Santo de Ponta Delgada, EPE, Ponta Delgada, Portugal
2. Radiation Oncology Department, Portuguese Oncology Institute of Porto, Porto, Portugal
3. Gastroenterology Department & Research Center of IPO Porto (CI-IPOP)/RISE@CI-IPOP, Portuguese Oncology Institute of Porto, Porto, Portugal
4. Faculty of Medicine, MEDCIDS – Department of Community Medicine, Information and Decision in Health, University of Porto, Porto, Portugal