https://medlineplus.gov/lab-tests/rheumatoid-factor-rf-test/
Rheumatoid Factor (RF) Test: MedlinePlus Medical Test
This blood test measures rheumatoid factors. High levels of rheumatoid factors may be a sign of rheumatoid arthritis or another autoimmune disease. Learn more.
rheumatoid factor rftest
https://www.health.com/rheumatoid-factor-11712585
Rheumatoid Factor (RF) Test: Purpose, Results, Levels
A rheumatoid factor (RF) blood test can help detect rheumatoid arthritis and Sjögren syndrome. You may need it if you have symptoms like joint pain and...
rheumatoid factor rftest