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05/21/2014 - Boston, Mass. - Dr. Ed Saltzman, a scientist at the Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, poses for a portrait in the Jaharis Cafe on May 21, 2014. (Kelvin Ma/Tufts University)

05/21/2014 – Boston, Mass. – Dr. Ed Saltzman, a scientist at the Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, poses for a portrait in the Jaharis Cafe on May 21, 2014. (Kelvin Ma/Tufts University)