| http://www.w3.org/ns/prov#value | In their letter to FTC Chairwoman Edith Ramirez, the senators called on the agency to use its existing authority to investigate manufacturers who are making these false or unsubstantiated claims in their advertising. ???The FTC has not stepped in to protect consumers from the health risks posed by nicotine and other chemicals contained in electronic cigarettes,??? the Senators wrote. ???We believe
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