Correction for This Week in The Journal

Correction: In the “This Week in The Journal” section of the April 18, 2007 issue, the summary title “AD Mice Turn to Fish Oil” and the editorial comments within are incorrect. The study, by Green et al., did not use fish oil or fish products. Rather, the study used Martek Biosciences Corporation's long-chain polyunsaturated fatty acids, which are vegetarian algal oils produced from proprietary strains of microalgae. The Journal apologizes for this error.