He was one of the first amputees to try an initial version of the i-limb back in 2007.

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He was decades into his professional career when he began to see large numbers of patients who were suffering from mysterious conditions associated with lower back, neck, trunk, and limb pain.

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"When he was running for president in 1988, he had staff, he had handlers, he had people who could pull him back when he went too far out on the limb, " says Boston.

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Have you ever gone out on a limb to email someone, and then never heard back from them?

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