https://investor.ironwoodpharma.com/press-releases/press-release-details/2018/Ironwood-Pharmaceuticals-Announces-FDA-Orphan-Drug-Designation-for-Olinciguat-for-the-Treatment-of-Sickle-Cell-Disease/default.aspx
https://investor.ironwoodpharma.com/press-releases/press-release-details/2018/Ironwood-Pharmaceuticals-Announces-FDA-Orphan-Drug-Designation-for-Olinciguat-for-the-Treatment-of-Sickle-Cell-Disease/default.aspx