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The article, “FDA Approves New Indication for MS Drug” (Nov. 21, page 27), incorrectly stated that interferon beta-1b (Betaseron) is the only drug indicated for early multiple sclerosis (MS). In fact, it is the only high-dose interferon beta indicated for patients with a first clinical episode and MRI features that are consistent with MS. A low-dose interferon beta-1b (Avonex) is also approved by the FDA for patients with clinically isolated syndromes.