Two years' clinical experience with the implantable pacemaker for complete heart block.

@article{Chardack1963TwoYC,
  title={Two years' clinical experience with the implantable pacemaker for complete heart block.},
  author={W M Chardack and Andrew A. Gage and Gustav Schimert and N B Thomson and C E SANFORD and Wilson Greatbatch},
  journal={Diseases of the chest},
  year={1963},
  volume={43},
  pages={225-39}
}