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Charlotte and Gwenyth Gray
Charlotte and Gwenyth Gray

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    Sisters battle same rare disease

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Sisters battle same rare disease

CNN's Carol Costello speaks with the Gray family about their efforts to fund Batten disease research in the face of their daughters' diagnoses.

Sisters battle same rare disease

CNN's Carol Costello speaks with the Gray family about their efforts to fund Batten disease research in the face of their daughters' diagnoses.