@misc{indiciaec594a1ca6252,
  title = {Third component of complement (C3) and fourth component of complement (C4) in discoid and systemic lupus erythematosus.},
  author = {G Risum},
  year = {1973},
  doi = {10.1159/000251897},
  url = {https://pubmed.ncbi.nlm.nih.gov/4132779/},
  note = {Source identifier: 4132779}
}