tokens: PbtO ( 2 ) decreased from 51 . 7 + / - 4 . 5 mm Hg sem to 33 . 8 + / - 5 . 2 mm Hg sem in the NTG group and from 38 . 6 + / - 6 . 1 mm Hg sem to 25 . 4 + / - 2 . 0 mm Hg sem in the NTG + NIMO groups , respectively .