1 Surgery Department, University Hospital 12 de Octubre, Madrid E-28041, Spain; Digestive Cancer Research Group, 12 de Octubre Research Institute, Madrid, Spain. Electronic address: josepereag@hotmail.com.
2 Digestive Cancer Research Group, 12 de Octubre Research Institute, Madrid E-28041, Spain.
3 Pathology Department, University Hospital 12 de Octubre, Madrid E-28041, Spain.
4 Digestive Cancer Research Group, 12 de Octubre Research Institute, Madrid E-28041, Spain; Molecular Biology Laboratory, University Hospital 12 de Octubre, Madrid E-28041, Spain.
5 Molecular Medicine Unit, Biomedical Research Institute of Salamanca (IBSAL), Institute of Molecular and Cellular Biology of Cancer (IBMCC), University of Salamanca-USAL-CSIC, E-37008 Salamanca, Spain.
6 Biomedical Research Institute of Salamanca (IBSAL), Institute of Molecular and Cellular Biology of Cancer (IBMCC), University of Salamanca-USAL-CSIC, E-37008 Salamanca, Spain.
7 Familial Cancer Clinical Unit, Spanish National Cancer Centre (CNIO), Madrid, Spain; Center for Biomedical Network Research on Rare Diseases (CIBERER), Institute of Health Carlos III, Madrid, Spain.