Lazarus J, Mather KA, Armstrong NJ, Song F, Poljak A, Thalamuthu A, Lee T, Kochan NA, Brodaty H, Wright MJ, Ames D, Sachdev PS, Kwok JB. DNA methylation in the apolipoprotein-A1 gene is associated with episodic memory performance in healthy older individuals. J Alzheimers Dis. 2015;44(1):175–82. doi: 10.3233/jad-141314. PMID: 25261444.