1. World Health Organization: Cervical cancer, human papillomavirus (HPV), and HPV vaccines- Key points for policy-makers and health professionals. 2007, ᅟ: WHO Press, http://whqlibdoc.who.int/hq/2008/WHO_RHR_08.14_eng.pdf ,
2. Cancer Registry of Norway: Annual Report 2008. 2009, Oslo: Cancer Registry of Norway
3. Castle PE: Screening: HPV testing for cervical cancer: the good, the bad, and the ugly. Nat Rev Clin Oncol. 2010, 7: 364-365. 10.1038/nrclinonc.2010.96.
4. Cancer Registry of Norway: Cancer in Norway 2009 - Cancer incidence, mortality, survival and prevalence in Norway. 2011, Oslo: Cancer Registry of Norway
5. Dillner J, Rebolj M, Birembaut P, Petry KU, Szarewski A, Munk C, de Sanjose S, Naucler P, Lloveras B, Kjaer S, Cuzick J, van Ballegooijen M, Clavel C, Iftner T: Long term predictive values of cytology and human papillomavirus testing in cervical cancer screening: joint European cohort study. Br Med J. 2008, 337: a1754-10.1136/bmj.a1754.