1. Hepatitis B. World Health Organization Fact Sheet 2004 (Revised October 2000) WHO website,2000
2. International Consensus Conference on Hepatitis B. Consensus statement;J Hepatol,2003
3. Hepatitis B virus infection: natural history and clinical consequences;Ganem;Semin Liver Dis,2004
4. Global epidemiology of hepatitis B virus;Custer;Clin Gastroenterol,2004
5. Hepatitis B vaccines. WHO website,2003