1. Human papillomavirus is a necessary cause of invasive cervical cancer worldwide;Walboomers;J Pathol,1999
2. Global burden of cancers attributable to infections in 2008: a review and synthetic analysis;de Martel;Lancet Oncol,2012
3. Ferlay J, Soerjomataram I, Ervik M, et al. GLOBOCAN 2012 v1.0. Cancer incidence and mortality worldwide: IARC Cancer Base No. 11. 2013. Available from: http://globocan.iarc.fr. [Accessed January 31, 2014].
4. Cancer Information Service. Cancer statistics in Japan: national estimates of cancer incidence based on cancer registries in Japan (1975–2012). 2016. Available from: http://ganjoho.jp/professional/statistics/statistics.html. [Accessed May 24, 2017].
5. National surveillance of sexually transmitted diseases of Japan in 2002;Kumamoto;Jpn J Sex Transm Dis,2004