Approximately 40 000 children with sickle cell anemia require screening with TCD and treating with hydroxyurea for stroke prevention in three states in northern Nigeria

尼日利亚北部三个州约有4万名镰状细胞贫血症患儿需要接受经颅多普勒超声（TCD）筛查，并接受羟基脲治疗以预防中风。