1. Ferlay J, Soerjomataram I, Ervik M, Dikshit R, Eser S, Mathers C, et al: GLOBOCAN 2012 v1.0, Cancer Incidence and Mortality Worldwide: IARC CancerBase No. 11 [Internet]. 2013, Lyon, France: International Agency for Research on Cancer, Available from http://globocan.iarc.fr
2. De Vuyst H, Alemany L, Lacey C, Chibwesha CJ, Sahasrabuddhe V, Banura C, et al: The burden of human papillomavirus infections and related diseases in sub-saharan Africa. Vaccine. 2013, 31 (Suppl 5): F32-46.
3. Ferlay J, Shin HR, Bray F, Forman D, Mathers C, Parkin DM: Estimates of worldwide burden of cancer in 2008: GLOBOCAN 2008. Int J Canc. 2010, 127 (12): 2893-2917. 10.1002/ijc.25516.
4. WHO/ICO: Summary Report [17 june 2014]. information centre on HPV and cervical cancer (HPV information center). Human Papillomavirus and related Deseases in Congo. 2014, http://www.hpvcentre.net/statistics/reports/COG.pdf,
5. Walboomers JM, Jacobs MV, Manos MM, Bosch FX, Kummer JA, Shah KV, et al: Human papillomavirus is a necessary cause of invasive cervical cancer worldwide. J Pathol. 1999, 189: 12-19. 10.1002/(SICI)1096-9896(199909)189:1<12::AID-PATH431>3.0.CO;2-F.