Affiliation: | 1. Istituto di Ricerche Farmacologiche “Mario Negri,”, Milano, Italy 2. Istituto de Biometria e Statistica Medica, Università di Milano, Milan, Italy 3. Centro Regionale di Riferimento Oncologico, Aviano (Pordenone), Italy 4. Istituto Europeo de Oncologia, Milan, Italy 5. Department of Surgery, University Hospital,Link?ping University, ink?ping, Sweden 6. Department of G astro enterology, University of Padova, Italy 7. Institute of Laboratory Medicine, University of Padova, Italy 8. Department of Surgery, The Center for Adult Diseases, Osaka, Japan 9. Department of Surgery, Lund University Hospital, S-221 85, Lund, Sweden 10. Department of Gastroenterology, Juniendo University, Tokyo, Japan 11. Department of Surgery, University Hospital, Link?pings University, Sweden 12. The Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE 13. Department of Surgery, University of Link?ping, Link?ping, Sweden 14. Institute of Medicine and Gastro enterology, University of Bologna, St. Or sola Hospital, Bologna, Italy 15. Department of Biomedical Sciences, Creighton University School of Medicine, Omaha, NE 16. Department of Surgery, University of Link?ping, Sweden
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