@article{a. chao2012disease-free,
  title={Long-term disease-free survival in three ovarian cancer patients with a single relapse},
  author={c.y. chen,h.p. chang,k.k. ng,c.c. wang,c.h. lai,a. chao},
  journal={European Journal of Gynaecological Oncology},
  volume={33},
  number={3},
  pages={321--323},
  doi = {10.12892/ejgo201203321},
  year={2012}
}