Before revision: It aims to enroll 20,000 participants (women 55 or over, men 50 or URL Retrieved April 5, 2013 who will be randomized to one of four groups: daily vitamin D (2000 IU) and fish oil (1 g); daily vitamin D and fish-oil placebo; daily vitamin-D placebo and fish oil; daily vitamin-D placebo and fish-oil placebo.
After revision: It aims to enroll 20,000 participants (women 55 or over, men 50 or over) who will be randomized to one of four groups: daily vitamin D (2000 IU) and fish oil (1 g); daily vitamin D and fish-oil placebo; daily vitamin-D placebo and fish oil; daily vitamin-D placebo and fish-oil placebo.