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Snyderman: You can’t sing with Parkinson’s

NBC News chief medical editor Dr. Nancy Snyderman says Linda Ronstadt’s career as a singer may be over, because Parkinson’s affects vocal cords like any other muscle in the body.

NBC News chief medical editor Dr. Nancy Snyderman says Linda Ronstadt’s career as a singer may be over, because Parkinson’s affects vocal cords like any other muscle in the body.