Use of spoken and written Japanese did not protect Japanese-American men from cognitive decline in late life.
Crane PK, Gruhl JC, Erosheva EA, Gibbons LE, McCurry SM, Rhoads K, Nguyen V, Arani K, Masaki K, White L. Use of spoken and written Japanese did not protect Japanese-American men from cognitive decline in late life. J Gerontol B Psychol Sci Soc Sci. 2010 Nov; 65(6):654-66.