Long-Term Dosing in Sickle Cell Disease Subjects with GBT440, a Novel HbS Polymerization Inhibitor - Lehrer-Graiwer, Josh; Howard, Jo; Hemmaway, Claire Jane; Awogbade, Moji; Telfer, Paul; Layton, Mark; Porter, John B.; Mant, Timothy; Dufu, Kobina; Hutchaleelaha, Athiwat; Oksenberg, Donna; Patel, Mira; et al. (Blood, 2016)