$KERX approved. NEW YORK, Sept. 5, 2014 (GLOBE NEWSWIRE) -- Keryx Biopharmaceuticals, Inc. (KERX) (the "Company") today announced that the U.S. Food and Drug Administration (FDA) approved Ferric Citrate (formerly known as Zerenex) for the control of serum phosphorus levels in patients with chronic kidney disease (CKD) on dialysis.
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