@misc{indiciae10cd3c33991e,
  title = {Erythrocyte protoporphyrin.},
  author = {E E Langer and R G Haining and R F Labbe and P Jacobs and E F Crosby and C A Finch},
  year = {1972},
  url = {https://pubmed.ncbi.nlm.nih.gov/5035993/},
  note = {Source identifier: 5035993}
}