@article{DA,
      recid = {6843},
      title = {Artificial heart valve},
      number = {DA},
      abstract = {Digital scan of a 35mm slide. Image of a ball-and-cage  style artificial heart valve set on a red background. The  valve has a metal ball enclosed in a metal cage entirely  covered in white mesh cloth. The photographer can be seen  reflected in the metal ball.},
      url = {http://digitalcollections.ohsu.edu/record/6843},
      doi = {https://doi.org/10.6083/M4ZP44SW},
}