Differential prevalence and geographic distribution of hepatitis C virus genotypes in acute and chronic hepatitis C patients in Vietnam by Ngoc, C, Thanh, T, Lan, P, Mai, T, Hoa, T, My, N, Van, T, Manh, H, Thanh, P, Vinh, C, Thwaites, G, Cooke, G, Heilek, G, Shikuma, C, Le, T, Baker, S, Rahman, M