FDA approves RARE’s Crysveta for X–linked hypophosphatemia: https://globenewswire.com/news-release/2018/04/17/1480423/0/en/Ultragenyx-and-Kyowa-Kirin-Announce-FDA-Approval-of-Crysvita-burosumab-twza-for-the-Treatment-of-Children-and-Adults-with-X-Linked-Hypophosphatemia-XLH.html