TY - RPRT TI - Negative complement-fixation tests with rheumatoid factor positive sera. A simple method for selective removal of rheumatoid factor. AU - G Haukenes PY - 1974 DO - 10.1136/ard.33.5.461 UR - https://pubmed.ncbi.nlm.nih.gov/4609231/ ID - 4609231 ER -