1. Endoscopy Unit, Department of Digestive Diseases, Hospital Universitari de Bellvitge, Barcelona, Catalonia, Spain
2. Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Catalonia, Spain
3. Universitat de Barcelona, Barcelona, Catalonia, Spain
4. Gastroesophageal Tumours Functional Unit (UTEG), Hospital Universitari de Bellvitge, Institut Català d’Oncologia, Barcelona, Spain
5. General and Digestive Surgery Department, Hospital Universitari de Bellvitge, Barcelona, Catalonia, Spain
6. Medical Oncology Department, Institut Català dʼOncología (ICO), Barcelona, Spain
7. Endocrinology and Clinical Nutrition department, Hospital Universitari de Bellvitge, Barcelona, Catalonia, Spain