@article{a. gorins2003and,
  title={Progestins and risk of breast cancer. Much ado about nothing?},
  author={a. gorins},
  journal={European Journal of Gynaecological Oncology},
  volume={24},
  number={5},
  pages={345--350},
  doi = {10.12892/ejgo200305345},
  year={2003}
}