University of Granada. Vitamin B: Choline Intake Improves Memory and Attention-Holding Capacity, Experts Say // ScienceDaily, accessed June 8, 2014 // ; Coreyann P. et al. The Relation of Dietary Choline to Cognitive Performance and White-Matter Hyperintensity in the Framingham Offspring Cohort // American Journal of Clinical Nutrition, 2011. Vol. 94, № 6. P. 1584–1591 // .