1. https://www.who.int/news-room/fact-sheets/detail/hepatitis-b.
2. https://www.who.int/news-room/fact-sheets/detail/hepatitis-d.
3. https://www.who.int/news-room/fact-sheets/detail/hepatitis-c.
4. https://www.who.int/news-room/fact-sheets/detail/hepatitis-e.
5. EASL 2017 Clinical Practice Guidelines on the management of hepatitis B virus infection;J Hepatol,2017