| http://www.w3.org/ns/prov#value | - SELECT is a 7- to 12-year, multinational, phase 3, randomized, placebo-controlled trial of selenium 200 ??g daily, vitamin E 400 IU daily, or combination therapy to see if these supplements can reduce the incidence of prostate cancer. [4] In 2001, this trial started recruiting men aged at least 50 years (African Americans) or 55 years (non-African Americans) (goal: N = 32,400).
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