Click on image to view larger version.

Figure 2 Effect of acetylcholine and nitroglycerin (NTG) on percent change in mean segment diameter (MSD) in both groups. Solid diamond = baseline; solid square = follow-up. *p = 0.09 for the difference between baseline and follow-up at maximal dosage of acetylcholine (placebo group). **p = 0.10 for the difference between baseline and follow-up at the maximal dosage of acetylcholine (folic acid/cobalamin group). p = 0.15 for the difference at baseline and follow-up between the placebo group and the folic acid/cobalamin group with the general linear model.