A new intracaval filter permitting continued flow and resolution of emboli.

@article{Greenfield1973ANI,
  title={A new intracaval filter permitting continued flow and resolution of emboli.},
  author={Lazar John Greenfield and J R McCurdy and P P Brown and Ronald C. Elkins},
  journal={Surgery},
  year={1973},
  volume={73 4},
  pages={599-606}
}