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Be webs. jenna: are we close know if there are any risks or side-effects. >> it is short term. mice only live year-and-a-half. when they start in humans well know the long term risk. >> how long of a horizon for folks with someone with alzheimers know how terrible this dizzy is? will we see something on the horizon in next enit to 15 years? >> i say five to 10 years. jenna i think this is promising for someone a high elevation of this enzyme we can now block it. we know this enzyme is related. w...