| the frequency of hepatitis d virus in patients with hepatitis b in iran: an increasing rate? | this study sought to determine the seroprevalence of the hepatitis d virus (hdv), the risk factors and its association with the severity of liver disease. continuous patients at tabriz and tehran hepatitis clinics were enrolled during 2007-2008 in a cross-sectional study. demographic data and possible risk factors for infection were recorded for all hepatitis b surface antigen positive patients. the blood samples of 847 patients infected with the hepatitis b virus were evaluated. the seroprevale ... | 2009 | 19535751 |