@misc{indiciae5b76390cecb8,
  title = {Differences in anti-protein A activity among IgG subgroups.},
  author = {G Kronvall and R C Williams},
  year = {1969},
  url = {https://pubmed.ncbi.nlm.nih.gov/4981688/},
  note = {Source identifier: 4981688}
}