@article{DA,
      recid = {6863},
      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 an red background. The  opaque plastic ball is enclosed in a white mesh  cloth-covered cage.},
      url = {http://digitalcollections.ohsu.edu/record/6863},
      doi = {https://doi.org/10.6083/M4CR5S1P},
}