KNX News Chief Correspondent Charles Feldman goes in depth into how the FDA approved two therapies for Sickle Cell Disease. Dr. Lewis Hsu is the Chief Medical Officer for the Sickle Cell Disease Association of America. 

<p>KNX News Chief Correspondent Charles Feldman goes in depth into how the FDA approved two therapies for Sickle Cell Disease. Dr. Lewis Hsu is the Chief Medical Officer for the Sickle Cell Disease Association of America. </p>
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