Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) COLOMBO M.,Screening for cancer in viral hepatitis.,Viral hepatitis A to F: an update. Postgraduate Course of AASLD.,,American Association for the Study of Liver Disease,1994,,,292-314,https://cir.nii.ac.jp/crid/1570291224434934656,