@misc{indiciae60e092f7903e,
  title = {Is there an optimal hemoglobin level?},
  author = {A J Erslev and J Caro and S J Schuster},
  year = {1989},
  doi = {10.1016/s0887-7963(89)70084-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/2520557/},
  note = {Source identifier: 2520557}
}