title: Why is there such difficulty in defining the natural history of hepatitis C?
authors.affiliation: National Institutes of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland 20892, USA. seeffl@xtra.niddk.nih.gov
authors.forename: L B
authors.initials: LB
authors.lastname: Seeff
mesh_terms: D006526:Hepatitis C / Q000209:etiology*; D006801:Humans; D011446:Prospective Studies; D012189:Retrospective Studies