Safety, Tolerability, Pharmacokinetics, And Pharmacodynamics Study Of PF-04447943, Co-Administered With And Without Hydroxyurea, In Subjects With Stable Sickle Cell Disease
Conditions
Interventions
- DRUG: PDE9i
- DRUG: PDE9i
- DRUG: placebo for PDE9i
- DRUG: PDE9i
Sponsor
Pfizer