@article{k. syrjänen2011high-risk,
  title={Persistent high-risk human papillomavirus (HPV) infections as surrogate endpoints of progressive cervical disease. Potential new endpoint for efficacy studies with new-generation (non-HPV16/18) prophylactic HPV vaccines},
  author={k. syrjänen},
  journal={European Journal of Gynaecological Oncology},
  volume={32},
  number={1},
  pages={17--33},
  doi = {10.12892/ejgo201101017},
  year={2011}
}