@article{k. syrjänen2012of,
  title={Covariates of high-risk human papillomavirus (HPV) infections are distinct for incident CIN1, CIN2 and CIN3 as disclosed by competing-risks regression models},
  author={k. syrjänen,i. shabalova,l. sarian,p. naud,a. longatto-filho,s. derchain,v. kozachenko,s. zakharchenko,c. roteli-martins,r. nerovjna,l. kljukina,s. tatti,m. branovskaja,m. branca,v. grunjberga,m. eržen,a. juschenko,l. serpa hammes,j. podistov,s. costa,s. syrjänen,the nis,lams study research groups},
  journal={European Journal of Gynaecological Oncology},
  volume={33},
  number={1},
  pages={5--14},
  doi = {10.12892/ejgo20120105},
  year={2012}
}