Words similar to rf

Example sentences for: rf

How can you use “rf” in a sentence? Here are some example sentences to help you improve your vocabulary:

In the absence of RF, the presence of one or more of these antibodies carried a sensitivity of only 31% for RF- RA, with anti-Sa being the most specific at 98%.
AFA, anti-Sa and anti-CCP were all highly specific for this diagnosis, and when any of them were present in conjunction with RF, the specificity for RA approached 100%.
RF was tested by nephelometry.
Most RF exposure studies are inconclusive.
Neither RF nor SE were associated with the disease severity measures, and analyses evaluating all the other autoantibodies failed to reveal a similar trend.