1. Molecular Oncology Group; Investigation Centre, Portuguese Institute of Oncology; Porto Portugal
2. Abel Salazar Institute of Biomedical Sciences; University of Porto; Porto Portugal
3. Research Department; Portuguese League Against Cancer; Porto Portugal
4. Section of Virology; Imperial College Faculty of Medicine; London UK
5. Faculty of Health Sciences of Fernando Pessoa; University of Porto; Porto Portugal
6. Gastroenterology Department; Portuguese Institute of Oncology; Porto Portugal
7. Faculty of Medicine, CINTESIS/Department of Biostatistics and Medical Informatics; University of Porto; Porto Portugal