phytohemagglutinin-induced t cell colony ( greater than 50 cells/aggregate ) and cluster ( 10-50 cells/aggregate ) formation was studied by one-stage microagar culture in glass capillaries by peripheral blood mononuclear cells from 26 young healthy individuals ( 20-32 years ) and 26 aging subjects ( greater than 65 years ) .
C0007634
cells
C1321301
peripheral blood mononuclear cells