Use of glass beads to defibrinate serum in "microtainers".

@article{Orlowitz1981UseOG,
  title={Use of glass beads to defibrinate serum in "microtainers".},
  author={L Orlowitz and F H Bostwick},
  journal={Clinical chemistry},
  year={1981},
  volume={27 3},
  pages={511}
}