TY  - RPRT
TI  - [The rheumatoid factor (RF, rheuma factor, agglutination activating factor, RA factor)].
AU  - V TSONCHEV
AU  - N POPOV
PY  - 1961
UR  - https://pubmed.ncbi.nlm.nih.gov/13778405/
ID  - 13778405
ER  -