1. World Health Organisation, Dept. of Communicable diseases surveillance and Response. WHO/CDC/CSR/LYO/2002.2: Hepatitis B. Available: http://www.who.int/csr/disease/hepatitis/HepatitisB_whocdscsrlyo2002_2.pdf [accessed on 14.4.09].
2. Hepatitis A position paper;World Health Organisation (WHO);Wkly Epidemiol Rec,2000
3. Global impact of hepatitis A virus infection; changing patterns;Hadler,1991
4. World Health Organisation (WHO). Hepatitis B Fact sheet. Available: http://www.who.int/mediacentre/factsheets/fs204/en/ [accessed on 18.8.09].
5. A two dose schedule for combined hepatitis A and hepatitis B vaccination in children ages one to eleven years;Van Der Wielen;Pediatr Infect Dis J,2000