A comparative observational study to evaluate the safety and effectiveness of Xromi® (hydroxycarbamide oral solution 100mg/ml) for the prevention of vaso-occlusive complications of sickle cell disease in children under 2 years of age. [PRECISE PASS]First published 16/12/2024 Last updated 15/05/2025 EU PAS number: EUPAS1000000076StudyPlanned