A rheumatoid factor test checks for an antibody that can be a marker for rheumatoid arthritis. It is one part of diagnosis. Not everyone with a positive rheumatoid factor blood test has rheumatoid ...

What Is the Rheumatoid Factor Test? A rheumatoid factor test, or RF test, is a blood test to look for rheumatoid factors in your blood. High levels of rheumatoid factor can show up in people with ...

Editor's note: To view a PDF version of this article, click here. The complexity of wireless communication devices, raises the need for extensive functionality testing. This only increases with higher ...