@misc{indiciaeccec87506042,
  title = {The first component of human complement--C1.},
  author = {R B Sim},
  year = {1981},
  doi = {10.1016/s0076-6879(81)80004-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/7043203/},
  note = {Source identifier: 7043203}
}