n-3 fatty acids from fish oil or fish oil supp-lements, but not alpha-linolenic acid, benefit cardiovascular disease outcomes in primary- and secondary-prevention studies: a systematic review. - Wang,C.; Harris,W.S.; Chung,M.; Lichtenstein,A.H.; Balk,E.M.; Kupelnick,B.; Jordan,H.S.; Lau,J. (Am J Clin Nutr, 2006)