Ultragenyx gains rare disease approval, voucher

FDA approved Crysvita burosumab-twza (KRN23, UX023) from Ultragenyx Pharmaceutical Inc. (NASDAQ:RARE) and partner Kyowa Hakko Kirin Co. Ltd. (Tokyo:4151) to treat X-linked hypophosphatemia in patients aged one year and older. FDA said Crysvita is the

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