1. Department of Medicine and Medical Specialities, Faculty of Medicine and Health Sciences, University of Alcala, 28801 Alcalá de Henares, Spain
2. Ramon and Cajal Institute of Sanitary Research (IRYCIS), 28034 Madrid, Spain
3. Cancer Registry and Pathology Department, Prince of Asturias University Hospital, 28806 Alcalá de Henares, Spain
4. Oncology Service, Guadalajara University Hospital, 19002 Guadalajara, Spain
5. Oncology Service, Prince of Asturias University Hospital, 28806 Alcalá de Henares, Spain
6. Department of General and Digestive Surgery, General and Digestive Surgery, Príncipe de Asturias Teaching Hospital, 28805 Alcalá de Henares, Spain
7. Department of Surgery, Medical and Social Sciences, Faculty of Medicine and Health Sciences, University of Alcalá, 28801 Alcalá de Henares, Spain
8. Unit of Biochemistry and Molecular Biology, Department of Systems Biology, University of Alcalá, 28871 Alcalá de Henares, Spain