I've looked this up and still don't understand. It was said the ANA IFA is the "gold standard" test. But the result is simply positive or negative. So it sounds like it's used to verify the quantitative, which actually gives dilutions and patterns.
Can anyone explain this to me? Both of mine are positive, but I don't understand (and would like to) the meaning of the IFA and why it is done after the quantitative. Anyone?