@article{isao otsuka2020cell,
  title={Clear cell carcinoma of the vagina followed by breast cancer in a patient without prenatal diethylstilbestrol exposure},
  author={isao otsuka},
  journal={European Journal of Gynaecological Oncology},
  volume={41},
  number={4},
  pages={638--639},
  doi = {10.31083/j.ejgo.2020.04.5007},
  year={2020}
}