animals sham irradiated or given 2000 rads in 10 fractions over 11 days and treated with an average dose of 1.2 mg mtx/kg i.p . twice a week for 24 weeks did not differ significantly in their brain mtx concentration ( 7.9 and 8.3 pmol mtx/g , wet weight , respectively ) .
C0006104
brain
C0086045
concentration