Late-onset X-linked sideroblastic anemia. Missense mutations in the erythroid delta-aminolevulinate synthase (ALAS2) gene in two pyridoxine-responsive patients initially diagnosed with acquired refractory anemia and ringed sideroblasts.

Department of Human Genetics, Mount Sinai School of Medicine, New York 10029, USA.

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Department of Human Genetics, Mount Sinai School of Medicine, New York 10029, USA.

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Department of Human Genetics, Mount Sinai School of Medicine, New York 10029, USA.

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Department of Human Genetics, Mount Sinai School of Medicine, New York 10029, USA.

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