@misc{indiciaeb797bf31ef74,
  title = {The relationship between opacity factor and M protein in Streptococcus pyogenes.},
  author = {G Hallas and J P Widdowson},
  year = {1983},
  doi = {10.1099/00222615-16-1-13},
  url = {https://pubmed.ncbi.nlm.nih.gov/6337260/},
  note = {Source identifier: 6337260}
}