Dr. Hossein Poustchi obtained his medical degree at Tehran University of Medical Sciences (Tehran, Iran), in 1995. He later completed his PhD in Epidmiology from University of Sidney in 2007, where he also obtained his specialization in Hepatology.Dr. Poustchi is highly active in research. His research interests include Hepatitis B, Nonalcoholic fatty liver disease and Hepatocellular carcinoma. Dr. Poustchi is one of the most active principal investigators of the Golestan Cohort Study, where he oversees the Golestan Hepatitis B Cohort Study.