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WikiPedia: Ryuta Kawashima http://www.touchgenerations.com/enGB/games_DS_TGP/... http://www.med.tohoku.ac.jp/room/831/english.html https://www.newscientist.com/article.ns?id=dn2538 https://web.archive.org/web/20070927203955/http://... https://web.archive.org/web/20080103124319/http://... https://en.wikipedia.org/wiki/Brain_Exercise_with_...