Detailed text transcripts for TV channel - CNN - 20100508:11:32:00
John volunteered to be one of the first people in the united states to participate in an operation to inject stem cells directly into his spine. it's called a phase one clinical trial. this is the first step. no one knows what will happen. >> here's how john got to this place. >> two years ago i was running, playing golf. >> and then gradually, literally, he began to lose it. >> started tripping and kind of like we thought it was like a foot drop and started catching my foot on bricks and curbs and started losing my balance initially and then developed a limp in my right leg. i lost the dexter...
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