Rheumatoid Factor (RF)Rheumatoid Factor (RF)How It FeelsThe blood sample is taken from a vein in
your arm. An elastic band is wrapped around your upper arm. It may feel tight.
You may feel nothing at all from the needle, or you may feel a quick sting or
pinch. Medical Review: Anne C. Poinier, MD - Internal Medicine Kathleen Romito, MD - Family Medicine Last Updated: June 4, 2012 |
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