1. World Cancer Report 2008. International Agency for Research on Cancer (IARC),2008
2. Estimated cancer incidence, mortality and prevalence worldwide in 2012. International Agency for Research on Cancer, World Health Organization;IARC.,2012
3. Estimates of the worldwide incidence of 25 major cancers in 1990;Parkin;Int J Cancer,1999
4. Cancer in Africa: epidemiology and prevention;IARC.,2003
5. Hepatitis viruses, monographs on the evaluation of carcinogenic risks to humans;IARC.,1994