the effect of treatment with phosphatidylcholine ( lecithin ) has been examined on splenocytes from young ( 6 months ) and aged ( greater than 20 months ) ( c3h/eb x c57bl/6 ) f1 male mice , by probing their responsiveness to proliferative signals of mitogens and mixed lymphocyte reaction .
C1959616
phosphatidylcholine
C0031617
lecithin