tokens: Neither L - arginine transport into mononuclear cells ( placebo vs active , 26 . 3 + / - 3 . 6 vs 29 . 0 + / - 2 . 1 pmol / 10 000 cells per 5 minutes , respectively , at an l - arginine concentration of 300 micromol / L ) nor L - arginine extraction in the forearm ( at 80 minutes , placebo vs active , 1 868 904 + / - 434 962 vs 2 013 910 + / - 770 619 disintegrations per minute ) was affected by cortisol treatment ; ie , that L - arginine uptake is not affected by short - term cortisol treatment .