"I think the earlier stages of Alzheimer's are the hardest. Particularly because the person knows that they are losing awareness. They're aware that they're losing awareness, and you see them struggling."

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Researchers and biotech executives foresee the day when the effects of many catastrophic diseases can be reversed. The damaged brains of Alzheimer's disease patients may be restored. Severed spinal cords may be rejoined. Damaged organs may be rebuilt. Stem cells provide hope that this dream will become a reality.

— George Woolf