[Open or closed operation for severe mitral stenosis?].

@article{Hoffmeister1972OpenOC,
  title={[Open or closed operation for severe mitral stenosis?].},
  author={Herrn Hoffmeister and Lorenzo Brunner and K Kalbow and K S Sinha and Josef Koncz},
  journal={Thoraxchirurgie, vaskulare Chirurgie},
  year={1972},
  volume={20 1},
  pages={38-43}
}