| http://www.w3.org/ns/prov#value | - SELECT was a phase III, randomized, double-blind, placebo-controlled, population-based trial.[18] More than 35,000 men, aged 50 years or older, from more than 400 study sites in the United States, Canada, and Puerto Rico were randomly assigned to receive vitamin E (all-rac-alpha-tocopherol acetate, 400 IU daily) and a placebo, selenium (L-selenomethionine, 200 ??g daily) and a placebo, vitamin E a
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