Studies suggest that a drug millions of Americans take to lower cholesterol may help people with multiple sclerosis. But experts urge doctors and patients to wait for evidence that it works in humans. NPR's Richard Knox reports.
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Since he joined NPR in 2000, Knox has covered a broad range of issues and events in public health, medicine, and science. His reports can be heard on NPR's Morning Edition, All Things Considered, Weekend Edition, Talk of the Nation, and newscasts.