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Young doctor helping St. Jude kids was once a patient

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TODAY is continuing our Thanks and Giving series about the life-saving work done at St. Jude Children's Research Hospital with a story of a young doctor who understands exactly what his patients are going through, because he used to be a patient at that same hospital. TODAY’s Willie Geist also sits down with Marlo Thomas, the National Outreach Director for St. Jude.