Editors' Pick Cognitive Function and Its Relationship with Macular Pigment Optical Density and Serum Concentrations of its Constituent Carotenoids. Kelly D, Coen RF, Akuffo KOwusu, Beatty S, Dennison J, Moran R, Stack J, Howard AN, Mulcahy R, Nolan JM J Alzheimers Dis. 2015 Aug 28; 48(1):261-77. PMID: 26401946. Abstract