Tawesak Tanwandee, MD, is hepatologist at division of gastroenterology and hepatology at Siriraj Hospital, Mahidol University, Bangkok, Thailand where he has been working for past 25 years. His current position is Associate Professor of Medicine and Head of Division of Gastroenterology (since 2008). He also serves as President of Thai Association for the Study of the Liver (THASL), and President of the 4th ASEAN Perspective in Liver Diseases 2016. His research interest is about treatment of chronic hepatitis B and C, hepatocellular carcinoma and cost effective of treating hepatitis B and C. He received a MD with first class honor and gold medal and received Thai Board of Internal Medicine, Gastroenterology. He also spent 2 years performing research in virology at Department of Molecular Virology, Baylor College of Medicine, Houston, TX. He is currently member of AGA, ACG, AASLD, EASL and APASL.