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NOVATO, Calif., March 8, 2012 /PRNewswire/ -- Ultragenyx Pharmaceutical Inc., a biotechnology company focused on developing treatments for rare and ultra-rare genetic disorders, today announced that the Phase 1 study of UX001 for hereditary inclusion body myopathy (HIBM) has been completed.  UX001 is an extended release formulation of sialic acid intended as a substrate replacement therapy for HIBM, a severe, neuromuscular disease caused by sialic acid deficiency.  UX001 is the first program from the company's pipeline to enter the clinic since its founding in 2010. The FDA Office of Orphan Products Development has granted orphan drug designation for UX001 for the treatment of HIBM.