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Lippelt, D. P., van der Kint, S., van Herk, K., & Naber, M. (2016). No Acute Effects of Choline Bitartrate Food Supplements on Memory in Healthy, Young, Human Adults. PLOS ONE, 11(6), e0157714. doi:10.1371/journal.pone.0157714 
10.1371/journal.pone.0157714