| geographic variations of human papilloma virus infection and their possible impact on the effectiveness of the vaccination programme. | greece is one of the first countries of the european union to introduce a human papilloma virus (hpv) vaccine in its national vaccination programme. geographical variations in the prevalence of the different hpv types have been demonstrated. the aim of this preliminary case control study was to investigate hpv infection in women with low- and high-grade squamous intraepithelial lesions (sils) from two different geographical areas of greece; central greece and crete. seventy-five cervical specime ... | 2008 | 18575729 |