In this May 2016 photo provided by Kite Pharma, cell therapy specialists at the company's manufacturing facility in El Segundo, Calif., prepare blood cells from a patient to be engineered in the lab to fight cancer. The experimental gene therapy, called CAR-T cell, turns a patient's own blood cells into specialized cancer killers and worked in the study, with more than one third of very sick lymphoma patients showing no sign of disease six months after a single treatment, its maker said Tuesday, Feb. 28, 2017. (Kite Pharma via AP)
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