"Vitamine D deficiency [2] is common among APS patients and is associated with clinically defined thrombotic events. Hypovitaminosis D [3] probably may have a complex origin in APS and may be part of the mosaic of factors that contribute to autoimmunity, rather than a consequence of chronic disease and treatment. To conclude vitamine D deficiency (<10-20 ng/ml) and insufficiency (<30 ng/ml) should be corrected in all antiphospholipid antibody positive (aPL) patients [4] based on general population guidelines. The prognostic role of vitamine D deficiency and therapeutic value of supplementation (including the dosage and definition of treatment goals) in aPL positive patients should be clarified by prospective studies."
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Letter to editor fr India