Nakamichi N, Nakao S, Masuo Y, Koike A, Matsumura N, Nishiyama M, Al-Shammari AHasan, Sekiguchi H, Sutoh K, Usumi K, et al. Hydrolyzed Salmon Milt Extract Enhances Object Recognition and Location Memory Through an Increase in Hippocampal Cytidine Nucleoside Levels in Normal Mice. J Med Food. 2019;22(4):408-415.