1 Digestive Cancer Research Group, 12 de Octubre Research Institute, Madrid 28041, Spain.
2 Molecular Biology Laboratory, Department of Biochemistry, 12 de Octubre University Hospital, Madrid 28041, Spain.
3 Department of Biochemistry, Gregorio Marañón University Hospital, Madrid 28009, Spain.
4 Molecular Medicine Unit, Biomedical Research Institute of Salamanca (IBSAL), Institute of Molecular and Cellular Biology of Cancer (IBMCC), University of Salamanca-USAL-CSIC, Salamanca 37007, Spain.
5 Department of Surgery, Fundación Jiménez Díaz University Hospital, Madrid 28040, Spain.
6 Department of Pathology, 12 de Octubre University Hospital, Madrid 28041, Spain.
7 Familial Cancer Clinical Unit, Spanish National Cancer Centre (CNIO), Madrid 28029, Spain.
8 Center for Biomedical Network Research on Rare Diseases (CIBERER), Institute of Health Carlos III, Madrid 28029, Spain.