[Sponge biopsy of the esophagus].

@article{SAVONUZZI1952SpongeBO,
  title={[Sponge biopsy of the esophagus].},
  author={G SAVONUZZI and L Ferranti},
  journal={Il Progresso medico},
  year={1952},
  volume={8 20},
  pages={629-34}
}