1. Epithelial Carcinogenesis Group Spanish National Cancer Research Centre – CNIO Madrid Spain
2. CIBERONC Madrid Spain
3. Department of Pathology, Hospital del Mar Universitat Autònoma de Barcelona Barcelona Spain
4. Department of Pathology Oslo University Hospital Oslo Norway
5. Institute of Clinical Medicine University of Oslo Oslo Norway
6. ARC – Net Centre for Applied Research on Cancer and Department of Pathology and Diagnostics University and Hospital Trust of Verona Verona Italy
7. Departament de Ciències Experimentals i de la Salut Universitat Pompeu Fabra Barcelona Spain