%0 Journal Article %T Vitamin B12 Serum Concentrations in 528 Apparently Healthy Human Subjects of Ages 12-94 %A Gaffney, George, W. %A Horonick,, Andrew %A Okuda,, Kunio %A Meier,, Paul %A Chow, Bacon, F. %A Shock, Nathan, W. %J Journal of Gerontology %V 12 %N 1 %P 32-38 %@ 0022-1422 %D 1957-01-01 %I Oxford Academic %~ DeepDyve