A randomised controlled trial investigating the effect of n-3 long-chain polyunsaturated fatty acid supplementation on cognitive and retinal function in cognitively healthy older people: the Older People And n-3 Long-chain polyunsaturated fatty acids (OPAL) study protocol [ISRCTN72331636]. Dangour AD, Clemens F, Elbourne D, Fasey N, Fletcher AE, Hardy P, Holder GE, Huppert FA, Knight R, Letley L, Richards M, Truesdale A, Vickers M, Uauy R Nutr J 2006, 5:20 [Full text] [PubMed] [Related articles]
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