Y. Zhang et al., “Intakes of Fish and Polyunsaturated Fatty Acids and Mild-to-Severe Cognitive Impairment Risks: A Dose-Response Meta-Analysis of 21 Cohort Studies,” American Journal of Clinical Nutrition 103, no. 2 (February 2016): 330–40, doi: 10.3945/ajcn.115.124081; T. A. D’Ascoli et al., “Association between Serum Long-Chain Omega-3 Polyunsaturated Fatty Acids and Cognitive Performance in Elderly Men and Women: The Kuopio Ischaemic Heart Disease Risk Factor Study,” European Journal of Clinical Nutrition 70, no. 8 (August 2016): 970–75, doi: 10.1038/ejcn.2016.59; K. Lukaschek et al., “Cognitive Impairment Is Associated with a Low Omega-3 Index in the Elderly: Results from the KORA-Age Study,” Dementia and Geriatric Cognitive Disorders 42, nos. 3–4 (2016): 236–45, doi: 10.1159/000448805.
