TY  - RPRT
TI  - The relationship between opacity factor and M protein in Streptococcus pyogenes.
AU  - G Hallas
AU  - J P Widdowson
PY  - 1983
DO  - 10.1099/00222615-16-1-13
UR  - https://pubmed.ncbi.nlm.nih.gov/6337260/
ID  - 6337260
ER  -