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Californian Jim Gass was moderately disabled by a stroke and underwent commercial stem cell treatments in Mexico, Argentina and China, in hopes of restoring function to a paralyzed arm and weak leg. $300,000 later, he’s paralyzed from the neck down, except for one arm, by a massive spinal tumor composed of someone else’s cells. The New York Times talked with Gass, who ignored the fact that none of the stem cell purveyors could support their success or safety claims with science. “Don’t trust anecdotes,