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NRBC lab results

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    NRBC lab results

    I have been on Tysabri for several years. I have recently had a flare and my doctor ordered blood work. The NRBC came back positive as a 2. Have any of you experienced the same? It is a count of premature blood cells released by the bone marrow. It is not normal in adults. But I did see one study linking it to tysabri.
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