“Extractable Nuclear Antigen Antibodies (Anti- SSA, Anti- SSB)” has been added to your cart. View cart “Anti-extractable Nuclear (A/g)” has been added to your cart. View cart “HLA-B27 Antigen” has been added to your cart. View cart Previous Product Next Product Magnesium, Serum $139.00 Evaluate levels of magnesium in the blood (urine) and determine the cause of abnormal magnesium levels. Magnesium, Serum quantity Add to cart Category: Individual Testing Description Description Magnesium, Serum Related products Quick View Quick View Individual TestingFollicle-stimulating Hormone (FSH) $70.00 Add to cart Quick View Quick View Individual TestingComprehensive Metabolic Panel (CMP) $39.00 Add to cart Quick View Quick View Individual TestingCeliac Disease A/B Screen $159.00 Add to cart