Hospital de la Croix-Rousse;
Department of Pathology;
Lyon;
France;
Centre;
Hospital de la Croix-Rousse;
Department of Gastroenterology;
Lyon;
France;
Department of Pathology and Biology of Diseases;
Graduate School of Medicine;
Kyoto University;
Kyoto;
Japan;
Brigitte Pignatelli;
International Agency for Research on Cancer.Endogenous Risk Factors Group;
Lyon.France;
Clinical Epidemiology Unit;
Department of Medical Information;
Hospices Civils de Lyon;
France;